Description: Upgraded Aluminum MK8 Extruder Drive Feed kit for CR-10, 10S, S4, S5 Can replace the acrylic parts. Fits for all 1.75mm filament. It is more stable and durable. With mounting screws, easy to install. Package Includes: 1 Piece MK8 Extruder Drive Feed Kit Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !