lifting range:230-457mm N.W.: 6.0kg close release valve,put the handle into the handle socket up and down to meet requirement ModelCapacityMin.HLifting H.Adjust H.Max.H.N.w.Qty/ctn1*20FCLLC20408B8T230mm147mm80mm457mm6.0kg4pcs/ctn2765PCSBase of jack should always rest on a firm,level surface.Never work under the lift load without additional support means.Turn the release valve clockwise until it ...