Online Parts Store › Seachoice Chrome Plated Plastic Thru-Hull Image 1 of 1 Seachoice Chrome Plated Plastic Thru-Hull $12.24 Use in place of stainless steel thru-hulls. Not recommended for use below the waterline. Add To Cart Added! Use in place of stainless steel thru-hulls. Not recommended for use below the waterline. You Might Also Like Seachoice Thru-Hull Connector w/ Broad Flange, White Finish, 1.125 In. $10.59 Seachoice Stainless Steel Covered Thru-Hull $14.35 Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 1 in. Hose, 1-1/2 in. Max. Hull $79.23 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $17.04 Seachoice 90-Degree Thru-Hull Connector, Fits 1-1/8 In. ID Hose, 1-1/8 In. Max Hull $17.65