Power magnetic base,magnetic force:40kg Flexible rm is plastic. llluminant sources selects incandescent lamp,60w screw socke Magnetic Lamps:Power magnetic base,magnetic force:40kgFlexible rm is plastic.llluminant sources selects incandescent lamp,60w screw socket bulb.Arm length:280mmBase size: Φ 40x25Code NoModelPower SupplyLZ-62610-A10MSL-220V/50HzLZ-62610-B10MSL-110V/60Hz