SUS304 Stainless Steel Body, RUST-PROOF: Body is constructed of Type 304 premium grade stainless steel, with added 18/8 Chromium/Nickel content to protect against corrosion and rust. No Leaks, Easy to Install: This sink drain assembly comes with 1 heavy brass nut and 2 silicone gaskets. Please make sure the gaskets are in the right position (please refer to product pictures) to avoid leakage. One-piece body (not seperated two parts connected by threaded shank), is designed to avoid leakage and can be easily installed. No More Clogged Drains: Pop up plug comes with build-in anti-clogging metal strainer, designed to effortlessly catch any type of human or pet hair without disrupting the flow of water. When it's time to cleanup, simply take the strainer out, wipe it off and GO! No harsh chemicals, no more tangled messes. Standard 1 3/4" Drain Opening: Fits sink hole diameter 1.46" to 1.9". MAX. sink thickness 1.97". Tailpiece diameter: 1.25". Ideal for sinks without overflow (above-countertop vessel sink, vanity sink, etc.) Package Included: Package includes drain housing with 2 gaskets, pop up plug with the strainer basket, one brass nut and one plumber's tape.