Online Parts Store › Seachoice Stainless Steel Covered Thru-Hull Image 1 of 1 Seachoice Stainless Steel Covered Thru-Hull $18.91 Molded from polypropylene with glass fiber for strength. Not recommended for use below the waterline. Add To Cart Added! Molded from polypropylene with glass fiber for strength. Not recommended for use below the waterline. You Might Also Like Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 1-1/2 In. Hose, 1-1/2 In. Max. Hull $115.19 Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 1-1/8 in. Hose, 1-1/2 in. Max. Hull $94.55 Seachoice Thru-Hull Connector w/ Broad Flange, Fits 3/4 In. ID Hose, 1-1/4 In. Max Hull $6.22 Seachoice Polypropylene Extra Long Thru-Hull Connector for 3/4 in. ID Hose, White Finish $9.84 Seachoice 90 Degree Plastic Thru-Hull, White $16.00