The Manfrotto 123 Pivoting Boom Clamp is a pivoting clamp for use with all Super Booms and Heavy Duty Booms. Pivoting clamp for 35mm diameter boom shafts. 1-1/8" male, and 5/8" female receptor.
This product can expose you to chemicals including lead, which is known to the state of California to cause cancer and birth defects or other reproductive harm.