... :ISO,DIN,JIS,GB 3)Certification:ISO9001:2000 Variable Spring Hangers1)Size:upon the drawing or requirement2)Standard:ISO, ... offer the product details as follows:1) Name: variable spring hangers, constant spring hangers2) Material: carbon steel, stainless steel, alloy steel ... to client drawing4) Standard: ISO, JIS, DIN, GB5) Application: supporting piping and equipment subject to vertical movement