Constructed from three assembled aluminum tubes with a black anodized surface treatment, the Kupo Aluminum Baby Boom can be fully extended to 6.6' (2m)and loads up to 6.6lbs (3kg). Easy to set up and break down with the provided Allen key on the T-handle. The dismantled length of each tube is 28 (71cm)which is perfect for storage or transportation. The metal pivoting boom clamp can attach to the shaft of most lightstands and comes with 3/4 (20mm), 1 (25mm), 1 1/8" (30mm) , 35mm in diameter. The supplied counterweight can easily be moved up or down the boom accordingly, whereas a bag remains at the end of the boom only. Features a safety wire for extra level of security.