... ; OEM from China; Certification:ISO14001 ISO9001 SGS Specifications Small compression spring Process Capablilities Standard ISO, GB, DIN, JIS, ANSI, ... .8~M12Material Stainless, Steel,Brass, Steel,Bronze, Iron,Aluminum,Carbon steel,Alloy steel, silicon bronze,etc.Head/Tread styles According client's ... us for future business relationships and achieving mutual success! certificate Small compression spring