You will get 2 carbs for your 750 / 850 Norton Commando as pictured. These will replace your worn out Amal 930 / 30mm carbs. These are great carbs, with chrome flat slide for even metering and long life. These are easy to tune and will accept your current stock cables and air filter. The coned air filters, cables, and fuel lines are sold separately. All jets and parts are available. 

These are modeled after Keihin PWK, they have been modified in many ways so that they bolt right up to a Norton Commando and work great, no modifications necessary. These are easy to tune and perform great.