Magnetic cartridge: 1 1/8 in x 3 1/4 in x 1 1/4 in
The record contains a banker box containing 147 magnetic cartridges for the CDC 38503-1 Cartridge Storage Unit. Each cat ridge has a black release button at each end, which opens the cartridge to expose the tape. There are two numbers on each cartridge. One number consists of four characters and is stamped on the left side of the paper label, the other is five numbers long and is found on the right side of the label.