Online Parts Store › Seachoice 90 Degree Stainless Steel Covered Thru-Hull Image 1 of 1 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $28.11 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 3/4" Black Plastic Thru-Hull w/Broad Flange $8.00 Seachoice Stainless Steel Covered Thru-Hull $12.81 Seachoice Thru-Hull Connector w/ Broad Flange, White Finish, 1.5 In. $14.96 Seachoice Stainless Steel Covered Thru-Hull $14.56 Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 1-1/2 In. Hose, 1-1/2 In. Max. Hull $115.19