Beretta Choke Tube Game Mobilchoke 20mm Extended 12 GA

This new hunting choke fits all 12 gauge Mobilchoke shotgun barrels. Manufactured of high quality steel, heat-treated and specially coated to withstand the rigors of steel shot.The tube length extends 20 mm past the muzzle to provide easy identification, installation and removal. Each tube is fitted with a durable metal alloy band that is color coded and engraved with a game scene to identify the constriction. The engraved game scene allows the hunter to make the best choice of choke while in the field. This choke now features recessed tool notches for the standard Beretta choke wrench.

Where can I find the constrictions or dimensions on my Beretta choke tubes?

How can I tell which choke tubes fit in my shotgun?