The RAP-B-347U base consists of a 1″ diameter rubber ball connected at right angles to a 2″ x 1.7″ square base. The base has four pre-drilled holes at each corner, making the universal 1.5 x 1.188 (hole spacing) AMPS hole pattern.

This adapter/base is designed to hold the following devices:
Garmin? zumo? 400
Garmin? zumo? 450
Garmin? zumo? 500
Garmin? zumo? 550
Garmin? zumo? 660
TomTom Rider 2
TomTom Urban Rider

Material:
High Strength Composite

Ball Size:
1″ Rubber Ball “B” Size