welding gun, Gas cooled (QQ), water cooled (QS) and WP series are available with more than 60 specifications. we can ... ) Airproof performance: no leakage under 0.1MPa6) Many models availbale for your wide choice: QS-150A, QS-160A,QS-200A, QS ... , QQ-150A, QQ-160A, QQ-200A, QQ-250A, QQ-300A, WP-9, WP-17, WP-26FPacking: Carton TIG Welding Gun for welding machine