arlote Motor model: RS550 Motor Voltage: DC 21V Speed: 28000 rpm Gear: 14 teeth for 4/6 inch Cordless Mini Logging Saw Chainsaw Power Tool Accessories Colour:silver Material:Metal Package Contents: 1 x Brushed Motor 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.