Navitech Tablet pc in Car Headrest/Back Seat Black Expandable Firm Grip Mount Cradle For The Samsung Galaxy Tab 10.1 & 8.9 P7100 Android 3.0 Honeycomb Navitech's expandable mount is set for ultimate viewing pleasure , most will fit in this strong mounting device holding up to 10KG comfortably ideal for back seat viewing. Tablet devices can remained cased while mounted This mount is applicable to all cars with the standard two bard head rests (this is the most common head rest with two metal prongs that slide in and out of the seat.) The mounts Length and depth can be adjusted, minimum holding size 105x140x45 and holds a device a t maximum size of 195x320x55. The mount has been formed so that your tablet device can be viewed both horizontally and vertically.