Features: _x000D_ Die springs are primarily used in die machinery. _x000D_ Its inner diameter is half of outer diameter in general. _x000D_ For die springs, green color represents that the load grade is heavy load. _x000D_ Additionally, the heaviest load grade die springs are made in brown color. _x000D_ Widely used in stamping dies, metal die-casting dies, plastic dies as well as other elastic motion precision machinery and equipment, automotive fields. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Model (OD*Length): TH25*30mm, TH25*40mm, TH25*50mm, TH25*60mm, TH25*70mm, TH25*80mm, TH25*90mm, TH25*100mm (Optional) _x000D_ Material: 65MN Steel _x000D_ Color: Green _x000D_ Load Grade: Heavy Load _x000D_ Outer Diameter: 25mm _x000D_ Inner Diameter: 12.5mm _x000D_ _x000D_ Package list: _x000D_ 2 * Die Spring 1Die springs are primarily used in die machinery. 2Its inner diameter is half of outer diameter in general. 3For die springs, green color represents that the load grade is heavy load. 4Additionally, the heaviest load grade die springs are made in brown color. 5Widely used in stamping dies, metal die?casting dies, plastic dies as well as other elastic motion precision machinery and equipment, automotive fields.