Check the listing for details. 3DPrinter Accessory Suitable for CR-10S PRO Ender-3 Btech Double Pulley extruder. Color: red, Condition: New. Listed at 27.71 USD. 1.The product material adopts brand-new imported aviation aluminum material 2.Double-gear and double-pneumatic joint extrusion structure, high squeezing force, ensure smooth feeding, not easy to lose steps 3.Full Metal Aluminum Alloy,DIY Aluminum block, need to assembly by yourself 4.Pressure pushes the filament into the printer nozzle 5.Suitable for CR10S PRO machine, CR-10S PRO's aluminum alloy driver, but also can be installed in Ender-3, Tornado... colour: red Material: Aluminum Alloy size: 1.75mm Package Contents: 1 * CR-10S PRO extruder Only 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 allowed error is +/- 1-3cm.