1-3/4inch Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers

If your scupper is fine, why replace the whole thing? This flapper kit has a 1-3/4" diameter black rubber flapper, black plastic retainer wedge, and stainless steel screw to fit any scupper with a 1-3/4" flapper. If you have another scupper, just measure the flapper and:If it is 2" in diameter, you need Scupper Flapper Kit PER0002 If it is 1-7/16" in diameter, you need Scupper Flapper Kit PRE56553KT. If it is 1-5/8" in diameter, you need Scupper Flapper Kit PRE56677KT.