Fuel gas and oxygen tanks for jewelry and casting torches come is several sizes, each with its own size designation. Some tanks also have different connections for regulators as well. Use this chart to learn the differences. Download a pdf of Torch Tank Cylinder Sizes.

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Butane

300 ml

MAPP

16 oz. (1"-20 thread connection)

Propane

14.1 oz. (1"-20 thread connection)

5 lb. (CGA 510 tank fitting)

Acetylene

MC Tank (10 cu. ft.)
CGA 200 tank fitting

B Tank (40 cu. ft.)
CGA 520 tank fitting

Oxygen

M tank (40 cu. ft.)
CGA 540 tank fitting

R Tank (20 cu. ft.)
CGA 540 tank fitting

16 oz.
1"-20 thread