Description:1. Rectangular section, closed-end design. Die springs are primarily used in die machinery equipment, for plastic injection 3D printer electric parts.2. The loading grade of die springs in various colors (from lightest load to extra heavy load): yellow, blue, red, green, and brown.3. Made of 65Mn material, the surface is green paint, not easy to rust, more durable.Specification:Product Name: Compression Die SpringLoad Type: Heavy LoadColor: GreenHole Diameter(Outer Diameter): 20mm/0.79"Inner Diameter (tolerance +0.5mm): 10mm/0.39"Free Length: 45mm/1.77"Max Compression Rate: 24%Material: 65MnPackage Content:2pcs x Compression Die Spring
