Usage Tips:Pop-up cap and anti-clogging frame made of integral molding brass with shiny chrome finish, bullet core made of premium brass, equipped with 3 silicon seal-rings in 3 different positions. It's anti-rust, reliable, and durable. You can trust it.No need for hundreds on costly plumber bills, no need for troublesome tools on unclogging pipes, no need for worry about drain cleaners' pollution to the environment.Sink stopper or strainer? You need it all. Unlike other regular drain plugs, this innovative design cleverly combines 2 features water-seal and anti-clogging in 1. What a high-cost performance!Our sink drain stopper fits 99% US standard sink drain 1 1/8 inch to 1 1/2 inch. Please be sure to measure the sink drain hole before purchase. It is recommended to be used on drain hole diameter between 1.1"-1.5" COLOR MAY VARY