Online Parts Store › Seachoice Stainless Steel Covered Thru-Hull Image 1 of 1 Seachoice Stainless Steel Covered Thru-Hull $26.04 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 Seachoice 90-Degree Thru Hull Fitting, Fits 3/4 In. ID Hose, 7/8 In. Max. Hull $10.31 1/2" White Plastic Thru-Hull w/Broad Flange $6.70 Seachoice Stainless Steel Covered Thru-Hull $14.56 Seachoice Stainless Steel Covered Thru-Hull $18.91 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $28.11