1.For small area of grinding 2.swing:3mm, swing speed:18000RPM/min 3.pressure:4-6bar, intake diameter:1/4 4.chassis size:3" name: Miniature small area grinding machine1. For small area of grinding2. swing:3mm, swing speed:18000RPM/min3.pressure:4-6bar, intake diameter:1/44. chassis size:3" X-2021 Miniature small area Pneumatic sander,air sander