The Ultimate TS-80B Standard Speaker Stand has a built-in adapter that accommodates both 1-3/8" and 1-1/2" speaker sockets. Glass-reinforced polycarbonate telescoping collar has a die-cast metal clamp for maximum security and durability, and is designed to tighten easily. Telescoping tube stop increases safety and prevents accidental pulling out of the center tube. Large diameter main tube enhances stability and strength. Load capacity rated at 150 lbs. The die-cast metal leg collar clamp provides maximum strength, stability, and comes preset to proper tension. The rubber footcaps won't fall off! Height 3'8"-6'7". Ultimate gives you a ifetime guarantee with your TS-80B Speaker Stand.