All metal constructed, 45mm diameter pole, can be extended from 7-1/7\ to 9\
High grade electroplated chrome finish
Screw together tube high precision joints(almost seamless) for maximum strength, stability and smoothness
Double width pole support dome, spreads the load/pressure evenly on the ceiling, can loading maximum weight 440 pounds
The package is included 1x 125mm Extension and 1x 250mm Extension; Extra extension poles are not included, please search ASIN B00QQAX9L0(120mm), B0109Y1NG6(245mm), B0192PP9N6(500mm) if needed.