Online Parts Store › Seachoice 90 Degree Stainless Steel Covered Thru-Hull Image 1 of 1 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $17.04 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 5/8" White Plastic Thru-Hull w/Broad Flange $4.34 Seachoice Polypropylene Extra Long Thru-Hull Connector for 3/4 in. ID Hose, White Finish $9.84 Seachoice Stainless Steel Covered Thru-Hull $26.04 Seachoice Covered Thru-Hull Fitting w/ Stainless-Steel Flange, Fits 3/4 In. ID Hose $13.32 Seachoice Thru-Hull Connector w/ Broad Flange, Fits 1 In. ID Hose, 1-1/4 In. Max Hull $10.20