Tweet Auto-Cut 200 XT Production Pierce Capacity: 1" Maximum Pierce Capacity: 1-1/4" Plasma Gas: Air, O2, Ar-H2, N2 @ 120 psi (8.3 bar) Shield Gas: Air, N2 @ 120 psi (8.3 bar) Water Mist Secondary: (WMS) (Optional)H20 @ 10 GPH (0.6 l/min) Auto-Cut 300 XT Production Pierce Capacity: 1-1/4" Maximum Pierce Capacity: 1-1/2" Plasma Gas: Air, O2, Ar-H2, N2 @ 120 psi (8.3 bar) Shield Gas: Air, N2 @ 120 psi (8.3 bar) Water Mist Secondary: (WMS) (Optional)H20 @ 10 GPH (0.6 l/min)