Shower head diameter:8"(20cm) Shower Head: Rainfall Showerhead Material: Stainless Steel Number of Handles: Single Handle Finish:Matte Black Valve Type: Ceramic Valve Faucet Body Material: Brass Water Flow:1.8 GPM The valve with the rough part inside the wall Package： 1*square rain shower head 1*Shower valve [Material]:High quality stainless steel 304 rainfall shower head and solid brass shower mixer valve construction, matte black finish and brass combination are anti-corrosion and anti-rust, shower handle with valve ensuring durability and dependability. [Design]:The black rain shower head kit has 1/2" NPT male thread shower arm with 8 Inch Ultra-thin square overhead shower design with air in tech. The rainfall shower head and handle set has single handle design for effortless flow and temperature control. [Function]:Single function simple black shower faucet set.The shower head with valve kit included has single handle control water flow and temperature. [Installation]:Wall mount rainfall shower head and faucet set with rough-in valve installation type. The shower faucet and handle set come with clear install instruction.