1. Copper composition: High Pure Brass 59. 2. Plating layer: Copper: 7-8um, Ni: Above 10um, Cr: 0.25um 1. Copper composition: High Pure Brass 59.2. Plating layer: Copper: 7-8um, Ni: Above 10um, Cr: 0.25um3. Cartridge: Lifetime >500, 000 times for both open and close.4. Delivery time: 35 days. Contemporary Faucet (19.16.CM)