1.Material:50CrVA,60Si2MnA,70,T9A,65Mn,etc 2.left hand 3.ISO9001-2000certificate 4.can accept small order Compression SpringMaterial:50CrVA,60Si2MnA,70,T9A,65Mn,etcspring steel or as customers' requirement.Weight:1-30kgswire diameter:1mm-10mmspring have good hardness and resistence to both high and low temperatureapplication:hardware, plastic, toy, auto, battery, electronic communication, sofa, ...