The RAM-B-272U consists of a B size 1 rubber ball and mounting base measuring 1.18 x .75 x .2 with a 9mm hole. This angled bolt head adapter base
Made my GoPro camera mount for the utility rail
Universal For Bike Motorcycle Rearview Mirror Ball Socket - Temu
Buy RAM Mounts Angled Bolt Head Adapter Ball Base (9mm) at UTV Source. Best Prices. Best Service.
RAM Motorcycle Base with 9mm Hole and 1 Ball RAM-B-272U
Pinch Bolt Mount, 9mm Through Hole
FANAUE 1'' Ball Mount Base for Bike Motorcycle Rearview Mirror Aluminum Alloy 1 Inch Ball Socket Angled Bolt Head Adapter Holder - AliExpress
Motorcycle Angled Base W/ 10mm Hole 1'' Ball Head Adapter Work for RAM Mounts for Gopro Camera Smartphone for Garmin GPS - AliExpress
RAM Mounts Bolt Head Adapter Ball Base
Ram Ball Adapter
RAM 9MM ANGLED BOLT HEAD ADAPTER BALL BASE - RAM Mounts