... 1/4"-4" certificate: ISO9001 , CE material: brass body , brass ball, brass stem , Brass globe valvecode: BT1001size:1/4"-4"max pressure: 25 ... medium: water &non-causticity liquid ,&saturated steam. material: brass body , brass ball, brass stem , steel handle .BOTE BALL VALVE are bottom ... the ball valve have a double seal with elastic O-ringS chosen for their high resistance to ageing . perfect seal ...