Quick view Add to Cart Sierra 18-8054 Hose Barb 1/8"x 5/16" ID $6.99 $4.99 Sierra 18-8054 Hose Barb 1/8"x 5/16" ID Sierra replacement hose barb for Mercury and Mercruiser engines. Barb Size: 5/16" or 7.94mm NPT Size: 1/8" or 3.18mm Connection Type: Male Interchangeable... Add to Cart