This is a two-stage pressure gate regulator with a German solenoid coil. The model number is IT-88226. It is made of duralumin, a strong and light alloy. It has a 6 mm PU system that is compatible with CGA320 cylinders, Indian standard CO2 cylinders (W21.8 or ISTA), or standard Indian cylinders. It is an extremely precise decompression solenoid regulator with a built-in on-off switch. It can be used for aquariums up to 1000 liters in size.