Advantages: Product Parameters: 24V DC, 20000R/Min. Strong Compatibility: Suitable for CNC 3018 series engraving machines. Reliable Quality: Double ball bearing design, stronger engraving ability. Great Collect: High-quality collect can be more stable. Quick Installation: It can be directly installed on the spindle of the engraving machine. Specifications: Rated voltage: 24V Rated speed: 20000 RPM Material: metal Wiring direction: red connect to positive pole, black connect to negative pole COLOR: silver Package Contents: 1set cnc motor Only the above package content, other products are not included. Note: Light 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.