Detail smooth pulley idler wheel v-slot-Reprap Cnc 3D printer with bearing and 3D printer-aluminum Nema 17 stepper motor MSet2: 1*smooth idler pulley and 1*motor holder1. Smooth idler pulley is a freewheel that is easy to install.2. 9mm wide channel for channel lip which can be used to seal the tape3. Compatible with v-slot Mini V linear guides. Outer diameter: 22mm Product Features:1. Applicable to NEMA 17 stepper motor or linear v-slot;2. The slot can easily adjust the tension, and multiple holes can accommodate and design; Version-V16063 - T6 BoardThickness 3mmWidth: 12.7mm Color: Black Material: Plastic + Metal/Aluminum Product Supply List:1 * Smooth Idler Pulley1 * Precision Gasket -10x5x1mm1 * Nylon Insert Hex Lock Nut -M51 * Thin Bolt M5x25mm1 * Nylon Seal -1/82 * Ball Bearing 625 2RS 5x16x51 * Motor Holder PlateOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.