... as per ur drawings or samples if u need. U just need to supply us the spec ... of the springs u need: (1) Wire diameter (2) Material (3) Free length ... , minimum inside diameter (5) Number of coils 1 Wire diameter0.08-14mm2Materialcarbon steel,stainless steel, manganese steel ... sports goods, equipment, toys,etc 10More other infoIf u r interested in our items or any other questions ...