Extendable arm with double male spigot is great for supporting backgrounds or small light fixtures. Minimal height 48cm, maximal height 80cm. attachment (bottom): type 19; attachment (top): type 18; color: black; column cross- section: round; column tube diameter: 22.19mm.; material: aluminum; maximum height: 31.50 in.; minimum height: 18.90 in.; 2 sections; weight: 0.71 lbs.