RAM Mount Round 2.5 inch dia Round Plate with 2.25 inch D-Ball RAM-D-254U

RAM Mount 2.4375" Diameter Round AMPs Hole Pattern Base with 2.25" Rubber Ball

RAM-D-254U RAM Mounts Round AMPS Plate with D-Size 2.25-Inch Ball

RAM-D-202U RAM Mounts Large 3.68-Inch Dia Round Plate with D-Size 2.25-Inch Ball

RAM Mount 75x100mm VESA Monitor Plate with 2.25 inch D-Sized Ball RAM-D-246U

6pc RAM® 1.5" C-Size Ball Mount Double Ball Socket Arm RPR-111

RAM-D-235U; Double U-Bolt Ball Base for 1"-1.25" Rails with D Size 2.25" ball

RAM-D-202U RAM Mounts Large 3.68-Inch Dia Round Plate with D-Size 2.25-Inch Ball