The adapter puck is required for mounting Garmin head units to the Pro Blendr Alloy Computer Mount.

– Start with a Blendr stem, add the appropriate base, and finish with Pro Blendr Alloy Computer Mount and Garmin Adapter Puck for secure mounting of your Garmin head unit.
Blendr is an elegant, integrated accessory mounting solution
– For use with Garmin head units and Pro Blendr Alloy Computer Mount
– Removable design alloys quick and easy adapter puck replacement
– Attach your Garmin tether for an additional layer of security