Manfrotto 237HD Heavy-Duty Flex Arm - for Super Clamp

This Manfrotto 237HD Heavy Duty Flex Arm is 18mm in diameter, wider than the standard Flex Arm. Otherwise, it shares the identical feature set: 21.1" (55 cm) in length with a 5/8" hex stud to affix to the Super Clamp 035 and has a 3/8" female thread and 1/4" 20 male end.