The Garmin Descent T1 Air Spool and Flow Restrictor Kit replaces that of the Garmin Descent T1 Transmitter. It is essential to always keep this as a spare, and also to replace it annually to prevent any possibilities of leaks.

Divers will also need to use one out of the pair, depending on the mounting method of the Garmin Descent T1 Transmitter to the regulator first stage. 

Note: This product refers to only the Garmin Air Spool and Flow Restrictor, without the Garmin Descent T1 Transmitter that is shown only for illustration purposes.