Rising Rubber Disk Fitting Cartridge : High smoothness technology has been used in Rising Rubber Disk Fitting Cartridge so that its smoothness will always be maintained. Rising Rubber Disk Fitting Cartridge, survive 500,000 times open & close test.Multi Layer Chrome Plating : faucets climb the layer up to 7 layers. which shows the tap as a mirror look and protects the tap from dust mites for a long time and always keeps it fresh. Resitance to a variety of corrosion, nine crystal drilling electro-plating,qualities of materials. MATERIAL: High quality grade A solid Brass,not stainless steel,It's corrosion-resistant and durable with chrome finish,build to resist scratches, corrosion and tarnishing ensuring quality and longevity. This faucet used high quality copper Material Less than 0.25% total lead content by weight average. Which shows the tap as a mirror look and protects the tap from dust mites for a long time and always keeps it fresh.Copper