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, red color represents that the load grade is medium 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, red color represents that the load grade is medium 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: Material: 65MN Steel Color: Red Load Grade: Medium Load Outer Diameter: 30mm Inner Diameter: 15mm Package list: 2 * Die Spring Package List