The shop sold 2 self rod are aluminum alloy material! Black rod body, the sun does not reflect light! The base motion can be removed the head (small head), shooting more stable. -----Quality to strengthen sponge anti-skid treatment, in order to safe use. The 4 item weight: About 100g interface: 1/4. -----Made of ultra light aluminum alloy , through the oxidation blasted surface, can be used in the sea ,not be corrosion by salt water in the sea -----The maximum load: 2000g, length: the length of about 50cm (tested this length is appropriate) the shortest about 24.5cm. -----Package include : 1 x Monopod, 1 x Adapter, 1 x Screw, 1 x Phone Holder.