Usage: automotive, motorcycle and engine valve grinding repairs Grinder Weight: 1.3KG Working pressure: 0.3-0.6Mpa Working stroke: 5-15mm Number of shocks: 8-30 stepless adjustment Hz (times / second) Air consumption: 0.28 m 3 / min Dimensions: 230*205*65mm colour:Black + red + green Material:steel Package Contents: 1 * valve grinding machine 2 * valve grinding sand 3 * grinding cups 1 * manual 1 * tool box Only the above package content, other products are not included. Note: Light shooting 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.