RAM-D-254U - Round Base 62mm AMPS - D Series (2.25" Ball) vehicle-agriculture and vehicle headrest rails where

and vehicle headrest rails where there's no handlebar to mount to

if your arm uses the smaller 1" B ball

RAP-365-101-246U RAM® Twist-Lock™ Triple Suction Mount with 100x100mm VESA Plate (C Size)

Huawei Mate 20 X

RAM-D-254U - Round Base 62mm AMPS - D Series (2.25" Ball) vehicle-agriculture and vehicle headrest rails whereRAM D 254U RAM Round AMPS Plate with Ball The RAM D 254U is a 63. 5mm (2. 5") round AMPS plate fitted with a D size 2. 25" rubber ball. It's the round base needed to mount a D Series arm to most RAM cradles the larger RAM D 202U won't fit these, so this smaller plate is the one to use when connecting to AMPS pattern device holders. Key Features 2. 5" round plate connects to RAM device holders with the universal AMPS hole pattern D size 2. 25" RAM