Hole Diameter (Outer Diameter): 16mm; Inner Diameter (Tolerance +0.5mm): 8mm; Free Length: 65mm (+/- 2mm) Maximum Compression Rate: 32%; Color: Red; Load Type: Medium Load; Material: 65Mn / Anonymous delivery ✨ First come, first served ❣️ Immediate purchase OK ❣️ It was a gift. Please purchase this product if you are familiar with it. m(__)m / * Immediate purchase welcome, silent purchase at midnight OK ◎ * Only one item, first come, first served * Welcome to bulk purchase, feel free to comment * Free shipping! ・Please understand that the item will be stored at home and shipped in simple packaging. (⁎ᵕᴗᵕ⁎) ・Please check the actual photos for the condition of the product ♪ ※In order to sell at a slightly lower price, the item may be removed from the box and shipped due to shipping costs. #natsu2680's product list is here ✨ ☜ Rectangular section, closed-end design. Mold springs are mainly used in mold mechanical equipment, plastic injection 3D printers, and electrical components. Made of 65Mn material, the surface is painted red, rust-resistant, and durable. Package contents: 2 x Compression mold springs uxcell Mold Spring Spiral Press Medium Load Compression Mold Spring for 3D Printer Electrical Parts Red Outer Diameter 16mm Length 65mm 2 pieces 4-53 638