Amazon.com: RAM MOUNTS EZ-Roll'r Cradle for Apple iPad 7th, 8th & 9th Gen RAM-HOL-AP31U Compatible with RAM B 1" and C 1.5" Size Round Ball Bases : Electronics
Apple iPad Air (MD785LL/A) WiFi 16GB 1GB RAM iOS 9.7" Tablet - Space Gray | eBay
RAM iPad Pro 12.9” Perfect fit Cradle with 1” ball
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Amazon.com: RAM Mounts EZ-Roll'r Cradle for Apple iPad Pro 11" (1st - 3rd Gen) & Air 4 RAM-HOL-AP23U Compatible with RAM B 1" and C 1.5" Size Round Ball Bases : Electronics
RAM® EZ-Roll'r™ Cradle with Yoke Clamp Mount for Apple iPad mini 1-3 – RAM Mounts