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3D Printer 8x100mm Lead Screw Rod T Shape Linear Rail Bar Shaft Feature: Mainly use for Stepping motor driving guide rail. T shape design, make of high quality 304 stainless steel material. Easy to install and convenient to use. Fine producing and practical. Specification: Rod diameter: 6mm The outer tooth rod diameter: 8mm Whole length: 100mm Lead(the straight distance which turn a circle): 3mm Material: 304 stain less steel Package included: 1 x 3D printer lead screw rod