Features: brand new and high quality brand new and high quality High Quality Material: Made of high quality metal , eco‑friendly and stable, firm and durable. 2x Synchronization Wheel, 2x Brass Insert Nut, 1x Full Set of Screws, 2x Extrusion Wheel, 1x 3mm Pin, 1x Closed Loop Timing Belt, 2x Miniature Bearings, 1x 5mm Pin, 2x Orange Small Buckle, 2x Single Flange Bearing, 2x Bowden Air Connection First, 1x Spring + Washer. Easy to install: directly replace the old or broken one. Application: Good performance, convenient and practical, suitable for home and professional use. Lightweight Size: Portable and small size, easy to store and carry, bring you convenience. Specifications: Material: Metal Color: As the Picture Shows Net Weight: 100g/0.22lbs Package Includes: 2x Synchronization Wheel 2x Brass Insert Nut 1x Full Set of Screws 2x Extrusion Wheel 1x 3mm Pin 1x Closed Loop Timing Belt 2x Miniature Bearings 1x 5mm Pin 2x Orange Small Buckle 2x Single Flange Bearing 2x Bowden Air Connection First 1x Spring + Washer note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.