uxcell 3D Printer Die Spring, 6pcs 16mm OD 20mm Long Spiral Stamping Compression Mould Die Springs for 3D Printer Electric Part, Green

Hole Diameter(Outer Diameter): 16mm/0.63"; Inner Diameter (tolerance +0.5mm): 8.5mm/0.33"; Free Length: 20mm/0.79", Max Compression Rate: 24%; Color: Green; Load Type: Heavy Load; Material: 65Mn, Rectangular section, closed-end design. Die springs are primarily used in die machinery equipment, for plastic injection 3D printer electric parts., Made of 65Mn material, the surface is green paint, not easy to rust, more durable., Package Content: 6pcs x Compression Die Spring