Our Tripod 20P Leg Kit (20% lighter than last model) w/Ball Adaptor was designed to work with an ULCS clamp (not included). The leg, collapsed measures 8" and extends to 18". The foot is made of Delrin to survive heavy abuse. The Ball Adaptor is a standard 1" diameter ball with an O-Ring. Sliding parts are made from aluminum and hard anodized for long life. There are two plastic knobs for extending the two sections of the leg, they are easy on the hands and work well with gloves. Out of water (dry), one leg weighs 0.49 lbs (7.8 oz).