Description: All Metal MK-8 Extruder Feeder Drive 1.75mm Filament for Ender 3/3 Pro/3V2/3 Max Ender 5/5 Plus/5 Pro, CR-10 Series, CR-10S, CR-10 Plus, CR 20/20 Pro, CR-X. It makes loading the filament easier and smoother, no worries about filament scraping or breaking. 1 Meter Capricorn XS Serious Bowden PTFE tubing with lowest friction, more responsiveness, less retraction, more accurate prints, less slippage, wear, and tear on the extruder, and less clogging when printing chunky filaments 1 pair- white and black pneumatic couplers to secure PTFE in extruder. With 4 Pcs bed-level springs for stiff and accurate bed leveling. the springs are around 25mm long, which is longer for ender 3, ender 3 pro ender 3 v2 printer springs, You may use a tool to cut it to be shorter if you really like this product or adjust the hot bed to be higher to fit the springs. Specification: 1M Capricorn Premium XS bowden Tubing Best For Chunky Filaments: YES Best For Flexible Filaments: YES Material: Highest Quality Pure Virgin PTFE Melting Point: up to 340° C Outer Diameter 4mm/0.1 inch, Inner Diameter: 2mm/0.08 inch All Metal MK-8 Extruder Material: Aluminum Alloy Color: Red Drive Gear:40 Teeth Thread(LxW):19 x 12mm/0.7x 0.5 inch Pipe Cutter:78x 26 x 26mm/3.1 x 1.0 x 1.0 inch Metal Extruder Kit(LxW): 43 x 23mm/1.7 x 0.9 inch Size(LxWxH)66 x 26 x 10mm/2.6 x 1.0 x 0.4 inch Package Includes: 1x All Metal Extruder Kit 1x 1M Capricorn Premium XS bowden Tubing 1x Blue Pipe Cutter 1x KJH04-M6 White Pneumatic Couplers 1x PC 4-M10 Black Pneumatic Couplers 4x Bed-level springs 25mm