The Astro Pneumatic UCG100 Air Under Coating Gun is designed to apply undercoating, gravel guard, liquid bed liners, sound deadeners and gel coats. Range of use includes body shops, fabrication shops, industrial, marine and other professional markets. Specifications: Air Inlet Thread NPT: 1/4-inch, Avg. Air Consumption.: 6-12cfm, Air Pressure: 40psi, Net Weight: 1.65-pound.