Hole Diameter (Outer Diameter): 40 mm Inner Diameter (Tolerance +0.5 mm): 20 mm Free Length: 175 mm Maximum Compression Rate: 32% Color: Red Load Type: Medium Load Material: 65Mn ⭐Anonymous Shipping & Free Shipping⭐ Please check the actual photos for the product condition♪ #Click here for the saya product list❥❥✨☜ ✴︎To offer the product at a slightly lower price due to shipping costs, the product may be shipped without the box. Please understand and purchase the product as it is stored at home and shipped with simple packaging.ˊ- ----------------------------------------------- Rectangular section, closed-end design. Die springs are mainly used in mold machinery, plastic injection, and 3D printer electrical components. Made of 65Mn material, the surface is painted red, making it rust-resistant and durable. Package Contents: 1 x Compression Die Spring uxcell 3D Printer Die Spring 40 mm Outer Diameter 175 mm Length Spiral Stamping Medium Load Compression Mold Die Spring for 3D Printer Electrical Components Red 1 piece 1-41-5203