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Part # A B C D E
56553 3" 5-1/4" 1-1/2" 3" 1-7/8"
56555 3-5/8" 4-1/4" 2" 1-7/8" 2-3/8"
56557 3" 2-3/4" 1-1/2" 1-1/16" 1-7/8"
56553KT          
56555KT          
Thru Hull
56553 Thru Hull w/ Flapper
56555 2" Thru Hull w/ flapper valve
56557 1-1/2" Thru Hull, w/ flapper valve
56553KT Replacement Flapper Kit
56555KT Replacement Flapper Kit
Part # Inv.Class* Std.Pk. Req. Hole Size Material Finish
56553 A 12 1-⅞" 316 Stainless Steel Bright polish
56555 A 12 2-⅜" 316 Stainless Steel Bright polish
56557 A 12 1-⅞" 316 Stainless Steel Bright polish
56553KT A
56555KT A
* Indicates inventory availability
  1. Catalog items typically kept in stock and available for immediate shipment.
  2. Catalog items where inventory levels are determined by customer forecasts. May require lead time for new orders.
  3. Produced from custom tooling and stocked to purchase orders only.