Die Spring 4 Pack 25mm OD 30mm Long Spiral Stamping Light Load Compression Die Springs Blue

Description: 1. Rectangular section closed-end design. Die springs are primarily used in die machinery equipment for plastic injection 3D printer electric part. 2. The loading grade of die springs in various colors (from lightest load to extra heavy load): yellow blue red green brown. 3. Made of spring steel material the surface is blue painted not easy to rust more durable.