Sink waste: The sink is made of high quality copper, with a smooth surface, resistant to corrosion and rust. The seal is made of high quality silicon resin, resistant to aging and cracking, with strong sealing performance. Simple installation: automatic blow-out type, due to its simple and practical structure, complete installation can be done in a few steps without using commercial sink instructions. Unique Design: The sink-type waste water tank is uniquely designed to prevent overfilling. The solid brass spring core has good rebound and rebound resistance performance, so the water can be quickly sealed and drained. It only needs a press. Easy to clean: The bonded chrome ejects a large retractable surface, easy to clean and easy to disassemble. You can easily unscrew the top drain pressure cap and clean it with a rag. No hair and dirt. Wide range of applications: This tank applies to all commercial water tanks, with a standard installation size of 1 ", for kitchen and the bathroom, please note the size of the sink before purchase.