Partager : Thru-transom scupper with flapper Ref: 418158 White acetal construction + rubber flapper. Rubber flapper opens to drain water out and closes to prevent backwash. For 1" 1/2 hose. Length 159 mm, Ø 73 mmMax hull thickness : 79 mm. Add to Wishlist Associated products Related Products Anti-backwash rubber flapper for scupper 418158 Ref : 413342 View product All products in the range