Manufacturer: AMERICAN STANDARD Lid P/N: 735131 Lid Size: 18" x 8.75" Tank P/N: 4061 Tank Size: 17" x 8" Toilet Model: EVOLUTION 2 This is a reproduction toilet tank lid.These lids are custom designed with sophisticated 3D modeling software and manufactured in North Carolina. It is available as a beautiful sapele wood tank top simply coated with marine grade spar urethane to provide moisture resistance and also available to match any toilet manufacturers original color. The wood lid is glazed with an enamel epoxy coating so that it matches the color of your existing toilet. In most cases we already have the resin on the shelf in the color you need, but in some cases the color has to be ordered. The wood is primed to accept the finish and the finish is designed to last essentially forever. It hardens to a consistency similar to automotive paint and is chemical resistant so you can clean it with normal household cleaners.The lid is designed to accommodate tank internal parts that stick up as much as 0.2" above the height of the top of the tank. If you have a fill valve that sticks up above the tank more than that height, you can possibly replace your fill valve with a Fluidmaster 400A fill valve, or we may need to custom design a lid to accommodate your internal parts. Please contact us if this internal clearance will be an issue.In addition to offering any tank lid we've identified in these reproduction listings, we can custom manufacture ANY toilet tank top. This means if you need a lid for a tank that we've never seen before, we can still supply it. Simply take a piece of cardboard and place it on top of the tank, and as accurately as possible trace the outside of the tank. Mail us that tracing and we will be able to manufacture the lid for you.The lead time for these lids is typically 1 week to allow time for manufacturing, sanding, filling, priming, glazing, and curing. However, if we have to order the color you need we will notify you and that will typically add one week to the lead time.