Features 1、Die springs are primarily used in die machinery. 2、Its inner diameter is half of outer diameter in general. 3、For die springs, green color represents that the load grade is heavy load. 4、Additionally, the heaviest load grade die springs are made in brown color. 5、Widely used in stamping dies, metal die-casting dies, plastic dies as well as other elastic motion precision machinery and equipment, automotive fields. Specification Features: Die springs are primarily used in die machinery. Its inner diameter is half of outer diameter in general. For die springs, green color represents that the load grade is heavy load. Additionally, the heaviest load grade die springs are made in brown color. Widely used in stamping dies, metal die-casting dies, plastic dies as well as other elastic motion precision machinery and equipment, automotive fields. Specification: Model (OD*Length): TH25*30mm, TH25*40mm, TH25*50mm, TH25*60mm, TH25*70mm, TH25*80mm, TH25*90mm, TH25*100mm (Optional) Material: 65MN Steel Color: Green Load Grade: Heavy Load Outer Diameter: 25mm Inner Diameter: 12.5mm Package list: 2 * Die Spring Package List