The brand of material is 58-A which have test-report. All products are made by CNC. Max.Pressure:hydrostatic pressrure 30bar.Max.turn angle:720°Max.temperature:90Max.extension:6mmLife test:300,000 open and close cyclesTorque test:>15NMFitting method:G1/2Rotaion torque test when static pressure is zero:0.15-0.25NM slow open cartridge