NICKEL PLATED SOLID BRASS: Durable construction, solid brass bouncing cores have good bounce and rebound strength, quickly seal and drain water with a single press. • EASY TO INSTALL: Basin waste with standard G 1 ¼ BSPP connection, very easy to install. Perfect design and matches most bathroom / commercial vessel sink.• DOUBLE SEALING WASHERS: Selected high-quality silicone material, soft, extended aging, anti-dry crack and stronger sealing performance, to avoid annoying leaking water. • UNSLOTTED DESIGN: Suitable for basin without overflow, a good household helper for you.• POP UP: Solid brass bouncing cores have a good bounce and rebound strength. Only a Press can reach quickly seal and drain water.