The Photoflex Master Stand extends to a height of 12.5 feet. It is designed to support medium sized light fixtures with large umbrellas, or large softboxes -- a load of up to 18 lbs. It has a removable, reversible 5/8 in (16mm) diameter brass stud with a 1/4-20" thread on one end, and a 3/8 in (9.5mm) thread on the other.