The Astro Pneumatic 888C Dual Piston Straight Line Sander performs on plastic fillers at any stage of hardening. This tool feathers with ease and smoothness and features a dual piston which provides efficient power and prevents stalling. This tool also includes a two handle design for comfortable operation and 1" Stroke. The specifications are as follows: Pad Size: 2-3/4" x 15-3/4", Free Speed: 2,400 strokes per min., Overall Length: 16" (406mm), Net Weight: 6-1/2lbs. (2.5kg), Air Inlet Thread NPT: 1/4", Air Hose I.D. Size: 1/4" (6mm), Avg. Air Consumption: 6cfm and Air Pressure: 90-120psi.