Description: Suitable for European standard 2040-series aluminum profiles. Adjust the sliding smoothness by adjusting the hex eccentric column. Includes 1 extruder back support plate with 4 pulleys. Made of aluminum alloy, these wheels are durable and sturdy. The wheels offer good physical, mechanical, and chemical properties, with excellent wear resistance. Features: - Color: Black - Material: Aluminum alloy - Size: 5.00 x 0.60 x 0.60 cm / 1.97 x 0.24 x 0.24 inch - V-slot panel is simple to install, easy to use, compact, lightweight, portable, and offers reliable performance - Back support plate with pulleys is compatible with V-slot rails, ideal for DIY CNC or similar systems - Fold-through slots allow for easy belt threading - V-slot gantry plates available in multiple sizes - Constructed for long-term, durable use - Simple design with practical functionality for a smooth user experience Packing list: 1 x Aluminum profile pulley