Features and functions: 1. It is used for clean the surface welding seam of PVC window and door. 2. Pneumatic drive. 3. Precise positioning, compact structure and easy operation. Technical parameter: Working air pressure: 0.4~0.6MPa Air consumption: 25L/min Working route: 170mm Profile width: 30~120mm Dimension: 550 x 160 x 190mm Net weight: 4.8kg