The RAM-B-349-1U includes a M10 x 1.5 pitch male thread connected to a 1" rubber ball. The diameter of the round flange is 14.3mm and the thread length is 10.5mm.
BALL/SOCKET SIZE: B Size (1")
WEIGHT CAPACITY: Standard Use: 2 lbs, Heavy-Duty Use: 1 lb
MATERIALS: Marine-grade aluminum
WEIGHT: 0.08 lbs.