LENOVA A-SC-03 is a copper sink Strainer for Lenova Copper Sinks. Sink drains allow water to flow out of the sink basin into the p-trap and ultimately, to the swer. Sink drains can be matched to faucet material and can come with a stopper or grid drain. Some drains has a pull stopper or a push stopper. Basket strainers are also available with some sink drains.