Made of high quality rust-proof stainless steel, thickened and more durable. The sizes of the sink strainers are: 4pcs - 6cm external & 3.3cm Inner and 2pcs - 7.5cm external & 4.6cm inner Prevents drains from clogging and unpleasant odour formation. Ideal for kitchen and bathroom. You don’t need professional help to get it installed. It can be easily fitted anywhere with great ease and no mess at all. It fits anywhere with a great ease including your kitchen sinks, shower tubs and drains.