ZTechnik Accessory Mount; Double Top Plate Kit
The Double Top Plate Kit replaces the single round top plate of any current ZTechnik Accessory Mount. Mount a GPS and another device to the same Accessory Mount! Dual 3 in. x 2.25 in. plates, each with the industry standard 4-hole AMPS mount pattern. Top plates swivel independently. 
Material : 6061 T6 Aluminum 
Hardware: Mounts to any ZTechnik Accessory Mount.
Platforms: 3 in. x 2.25 in. (7.6cm x 5.7cm) 
You must purchase the following to install this product: Any ZTechnik Accessory Mount