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Of what? A MAPP gas cylinder looks just like a regular "Bernzo-matic" propane cylinder; there are probably a bunch of them on the hardware store shelf right next to the propane. I can take some pics if you still need them.
Here's a picture of a "Jewelers Torch". (The cylinder pictured is MAPP gas; propane cylinders are blue, while MAPP gas cylinders are yellow. Oxygen cylinder are red and expensive.)