Online Parts Store › Seachoice 90 Degree Stainless Steel Covered Thru-Hull Image 1 of 1 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $25.96 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 Chrome Plated Plastic Thru-Hull $12.24 Seachoice Polypropylene Extra Long Thru-Hull Connector for 3/4 in. ID Hose, White Finish $9.84 Seachoice Chrome Plated Plastic Thru-Hull $14.68 Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 1 in. Hose, 1-1/2 in. Max. Hull $79.23 5/8" White Plastic Thru-Hull w/Broad Flange $4.34