Online Parts Store › Seachoice Chrome Plated Plastic Thru-Hull Image 1 of 1 Seachoice Chrome Plated Plastic Thru-Hull $14.68 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 3/4" White Plastic Thru-Hull w/Broad Flange $4.71 Seachoice 90-Degree Thru Hull Fitting, Fits 3/4 In. ID Hose, 7/8 In. Max. Hull $10.31 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $14.56 5/8" White Plastic Thru-Hull w/Broad Flange $5.23 Seachoice Chrome Plated Plastic Thru-Hull $12.24