Keeney 1431SSBX The Work Horse Sink Strainer. This fixed post stainless steel basket strainer is designed for a 3-1/2" diameter kitchen sink opening. It features a safety rolled edge for added protection, a neoprene stopper for a secure seal, and a rubber locknut washer, locknut friction washer, die cast locknut, flanged tailpiece washer, and die cast long shank slip nut for easy installation. The stainless steel body ensures durability and longevity. Comes boxed.