Compatible with RAM Mounts B Size: This double socket arm is compatible with RAM mounts any B size 1" ball adapter, fits for any standard B size 1"/25.4 mm ball adapter, great use for extension to connect to your bike phone holder, motorcycle phone holder,sport camera mount, GPS holder YIMINGYINUO Double Socket Arm Medium Arm Compatible with RAM Mounts B Size 1" Ball Components for Bike/Motorcycle/ATV Phone Mount. This double socket arm is made of high strength aluminum alloy, it is durable and sturdy. YIMINGYINUO double socket arm can be used to connect two 1 inch ball components with 1" ball socket. Suitable for any 1 inch ball mount components, double ball and socket technology allows for near-infinite adjustable mounting bases and device compatible with ram mount/ram phone mount/ram mount arm/quad lock mount/ram mount accessories/ram mount extension arm/ram mount long arm/ram truck phone mount/double socket arm/ram double socket arm adapter with medium & long arms - b size/b size ram mount/tablet stand/ball mount/ram ball mount 1 inch/ram phone holder/zumo xt mount/ram double socket arm/phone mount/double socket arm 1" ball/double socket arm/ram trx phone holder/double socket arm b size double ball 20mm/double ball 20mm/double socket arm for 20mm ball/25mm ball mount arm/ball mount/ram phone mount/bulletpoint mounting solutions/ram mount arm/ram phone holder/ram arm/ram arm/ram mount extension arm/double socket arm 1 ball/ram mount short arm/ram truck phone mount/double socket arm/ram trx mount/double socket arm b size/double socket arm for 20mm ball/double socket arm 1" ball/1 inch ball extension arm/1 inch ball phone mount/ball mount extension arm. The 1 inch ball mount double socket arm is compatible with bike/motorcyle/phone holder/tablet holder/car/motorcycle/atv’s, bicycles and mount gps units, rear view mirrors, cell phone holders, compatible with action cameras,1 ball mount, etc.