RAM® Ball Base with 1.5" x 2" 4-Hole Pattern - D Size Home & Office>Desk & Tabletop The screws that are included

The screws that are included with the RAM-B-166-TO2U match up with the threads on the back of the RIDER cradle

5" diameter round bases with the universal AMPS hole pattern and sealed enclosed large size AQUA BOX®

The RAM-109V-3U consists of a 6" long single swing arm

The RAM-109H-2B-B-LO11 consists of a 6" long straight swing arm mounted on a horizontal surface mounting base

RAM® Ball Base with 1.5" x 2" 4-Hole Pattern - D Size Home & Office>Desk & Tabletop The screws that are includedThe RAM D 202U 225 contains a 2. 25" diameter rubber ball connected to a rectangular plate with a 4 hole pattern of 1. 5" x 2" center to center.