... magnesium alloy cartridge valve hydraulic manifold control valve hydraulic directional flow control valves Hydraulic Manifold Cartidge Valve Blocks for centralized control of hydraulic oil Product overview ... , 40CrMo, ect. 2Assembled with cartridge valve 3.good quality 4.Customized CNC machining MaterialSteel, Zinc, Aluminium, Brass, Copper, Bronze, ADC12, A380 ...