The 600 Series Blowguns are a thumb-lever blowgun with an ergonomic shape, and accept all Coilhose 1/8” tips. Designed for user comfort. Models that are designated as “safety” conform to OSHA standards for noise levels (1910.95) and 30 psi dead-end pressure (1910.242B). Plated finish provides easy cleaning. Tough die cast zinc body. Max Inlet Pressure: 150 psi. 1/4” NPT Inlet