The Jobo Cog Gears for the Processor Lifts, are generally purchased separately (two gears are included with each Lift Accessory).

One Cog Gear is required for every tank lid you'll want to use.

The Cog Gears snap into the mouth of the tank lids and become a permanent part of the lid.

The Lifts incorporate a transfer-gear that connects to the cog gear on to the tank

Note: they may seem like they could be removed because they use a compression o-ring system -- but they are not removable).