The Hobart Argon/CO2 Shielding Gas Cylinder provides 20 cu. ft. of Argon / CO2 shielding gas in an industrial-grade cylinder. The shielding gas cylinder valve has CGA 580 fitting. This shielding gas has excellent performance on thin materials with a clean weld appearance. Refillable argon/CO2 cylinder 20 cu. ft. Industrial-grade cylinder and valve with CGA 580 fitting C-25 (75% Argon, 25% CO2) is a preferred gas for MIG welding Excellent performance on thin materials Clean weld appearance with minimal spatter