The Manfrotto 014-38 Rapid Adapter is a locking adapter that fits any light stand with a 5/8" top stud, and will allow vertical or horizontal mounting of a light fixture, flash, or camera that has a 3/8" threaded receptor.
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.
The Manfrotto 022 Counter Balance Weight is a 15 lb painted iron counter balance weight for use with 90417 yoke assembly, or any heavy duty boom or light stand.