-16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7118-9
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Sierra Sierra O-Ring 5-pk #18-7118-9 $5.32 $6.26
Sierra 18-7118-9 O-RingsO-Ring (Priced Per Pkg of 5)Sierra O-Ring (Priced Per Pkg of 5) #18-7118-9Normalized SKU: 1871189UPC Code: 808282165123
Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7129-9
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Sierra Sierra O-Ring 5-pk #18-7129-9 $1.96 $2.30
Sierra 18-7129-9 O-Rings I.D.: 0.970" or 24.6mm Width: 0.065" or 1.7mm Qty: Pkg of 5 Normalized SKU: 1871299UPC Code: 808282165130
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7133-9
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Sierra Sierra O-Ring 5-pk #18-7133-9 $15.52 $18.52
Sierra 18-7133-9 O-Rings I.D.: 3.780" or 96mm Width: .135" or 3.4mm Qty: Pkg. of 5 Normalized SKU: 1871339UPC Code: 808282165147
-16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7134-9
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Sierra Sierra O-Ring 5-pk #18-7134-9 $7.68 $9.04
Sierra 18-7134-9 O-Rings I.D.: 0.500" or 12.7mm Width: 0.100" or 2.5mm Package of 5 Normalized SKU: 1871349UPC Code: 808282165154
-15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7137-9
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Sierra Sierra O-Ring 5-pk #18-7137-9 $7.26 $8.54
Sierra 18-7137-9 O-Rings I.D.: 0.320" or 8.1mm Width: 0.155" or 4mm Qty: Pkg. of 5 Normalized SKU: 1871379UPC Code: 808282165161
-15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7138-9
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Sierra Sierra O-Ring 5-pk #18-7138-9 $4.54 $5.34
Sierra 18-7138-9 O-Rings I.D.: 1.500" or 38.1mm Width: 0.210" or 5.3mm Qty: Pkg. of 5 Normalized SKU: 1871389UPC Code: 808282165178
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7139-9
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Sierra Sierra O-Ring 5-pk #18-7139-9 $11.28 $13.47
Sierra 18-7139-9 O-Rings I.D.: 1.080" or 27.4mm Width: 0.210" or 5.33mm Qty: Pkg. of 5 Normalized SKU: 1871399UPC Code: 808282165185
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7140-9
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Sierra Sierra O-Ring 5-pk #18-7140-9 $15.11 $18.04
Sierra 18-7140-9 O-Rings I.D.: 2.750" or 69mm Width: 0.135" or 3.4mm Qty: Pkg. of 5 Normalized SKU: 1871409UPC Code: 808282165192
-16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7141-9
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Sierra Sierra O-Ring 5-pk #18-7141-9 $2.19 $2.58
Sierra 18-7141-9 O-Rings I.D.: 0.180" or 4.6mm Width: 0.065" or 1.7mm Qty: Pkg. of 5 Normalized SKU: 1871419UPC Code: 808282165208
-15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7142-9
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Sierra Sierra O-Ring 5-pk #18-7142-9 $3.20 $3.76
Sierra 18-7142-9 O-Rings I.D.: 3.940" or 100mm Width: 0.135" or 3.4mm Qty: Pkg. of 5 Normalized SKU: 1871429UPC Code: 808282165215
-15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7143-9
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Sierra Sierra O-Ring 5-pk #18-7143-9 $2.13 $2.50
Sierra 18-7143-9 O-Rings I.D.: 1.310" or 33.3mm Width: 0.100" or 2.5mm Package of 5 Normalized SKU: 1871439UPC Code: 808282165222
Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7144-9
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Sierra Sierra O-Ring 5-pk #18-7144-9 $4.76 $5.60
Sierra 18-7144-9 O-Rings I.D.: 4.250" or 108mm Width: 0.135" or 3.4mm Qty: Pkg of 5 Normalized SKU: 1871449UPC Code: 808282165239
-16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7145-9
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Sierra Sierra O-Ring 5-pk #18-7145-9 $5.81 $6.84
Sierra 18-7145-9 O-Rings I.D.: 0.250" or 6.35mm Width: 0.100" or 2.54mm Package of 5 Normalized SKU: 1871459UPC Code: 808282165246
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7146-9
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Sierra Sierra O-Ring 5-pk #18-7146-9 $8.93 $10.66
Sierra 18-7146-9 O-Rings I.D.: 1.12" or 28.4mm Width: 0.100" or 2.5mm Package of 5 Normalized SKU: 1871469UPC Code: 808282165253
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7147-9
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Sierra Sierra O-Ring 5-pk #18-7147-9 $20.09 $23.98
Sierra 18-7147-9 O-Rings I.D.: 24mm Width: 3mm Pkg of 5 Normalized SKU: 1871479UPC Code: 808282165260
Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7149-9
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Sierra Sierra O-Ring 5-pk #18-7149-9 $2.33 $2.74
Sierra 18-7149-9 O-Rings I.D.: 15.000 mm Width: 1.500 mm Package of 5 Normalized SKU: 1871499UPC Code: 808282165284
-16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7151-9
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Sierra Sierra O-Ring 5-pk #18-7151-9 $2.19 $2.58
Sierra 18-7151-9 O-Rings I.D.: 3.000" or 76.2mm Width: 0.135" or 3.4mm Package of 5 Normalized SKU: 1871519UPC Code: 808282165307
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7152-9
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Sierra Sierra O-Ring 5-pk #18-7152-9 $11.16 $13.32
Sierra 18-7152-9 O-Rings I.D.: 2.625" or 66.7mm Width: 0.135" or 3.4mm Package of 5 Normalized SKU: 1871529UPC Code: 808282165314
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7153-9
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Sierra Sierra O-Ring 5-pk #18-7153-9 $8.71 $10.40
Sierra 18-7153-9 O-Rings I.D.: 0.862" or 21.9mm Width: 0.103" or 2.6mm Package of 5 Normalized SKU: 1871539UPC Code: 808282165321
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7155-9
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Sierra Sierra O-Ring 5-pk #18-7155-9 $8.39 $10.01
Sierra 18-7155-9 O-Rings I.D.: 1.620" or 41.1mm Width: 0.135" or 3.4mm Package of 5 Normalized SKU: 1871559UPC Code: 808282165338

Frequently Asked Questions

First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!

Yes, we offer FREE Shipping on most orders over $149 to US-48*.

Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.

  • Qualifies for Free Shipping: This item qualifies for free shipping when the order is $149+
  • Qualifies for Free Ground Shipping: This item qualifies for free ground shipping when the order is $149+.
  • Oversized - Not Qualified for Free Shipping: This item is too large/heavy to qualify for free shipping
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  • In-Store Pickup Only: This item can only be picked up in our Grain Valley, MO retail store

Below the price of the item, on the product page, there is a message indicating the availability of the product.

The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.

We offer a hassle-free return policy. If you're not completely satisfied with your purchase, you can return it within 30 days for a full refund or exchange.

If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.

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