Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Nice replacement for broken or old one, make your device work properly Easy to use stable performance Nice spare parts to upgrade your 3D Printer Colour:Photo Color Material:Metal type: B: Hardened steel nickel plated Package Contents: 1 x Upgrade Extruder Gear kit Only the above package content, other products are not included. Note: Light reflection 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.