Hydraulic prop hinged lid sealing cap assembly by hand valve plunger return spring base three cylinder valve O-ring 15,19, Collar 1014,16,20, pin-head bolt dust ring Y parameter-ring connecting wire guide ring component parts hydraulic strut suspension: Item Model maximum height (mm) minimum height (mm) Working stroke (mm) working resistance (kN) Weight (kg) pillars of the scope of work (mm) Amount working pressure (MPa) DW35-180 / 100X 3500 1960 1540 180 71 1960-3500 24.9 DW31-180 / 100X 3150 1780 1370 180 65 1780-3150 24.9 DW28-250 / 100X 2800 1600 1200 250 59 1600-2800 34.6 DW25-250 / 100X 2500 1430 1070 250 54 1430-2500 34.6 DW22-300 / 100X 2240 1280 960 300 49.5 1280-2200 41.5 DW20-300 / 100X 2000 1150 850 300 45 1150-2000 41.5 DW18-300 / 100X 1800 1035 765 300 41.5 1035 -1800 41.5 suspension according to prop Prop different specifications, the entire column weight than existing mainstay products reduced 15-30% more than the minimum height of the pillar is shortened, moving, transportation and use are very convenient. Prop Shandong Mining Limited issued with the company's new high-quality 27 silico-manganese are used to produce seamless steel pipe material, hydraulic prop prop I supply the complete model, generally are: 0.6 m, 0.8 m, 1 m, 1.2 m, 1.4 m, 1.6 m, 1.8 m, 2 m, 2.2 m, 2.5 m, 2.8 m, * m, 3.5 m, 3.8 m, 4 m, 4.2 m, 4.5 m, but also according to your needs, professional custom processing!