Co2 fine-tuning valve made of metal material for easy adjustment, precise Mini control, and less prone to air leakage It can be opened for cleaning and disassembly, making it convenient to check the bubble recorder interface. All are equipped with excellent leather pads for wear resistance, anti , and strong fixation The internal valve needle is made of stainless steel material to avoid wear between copper and copper, resulting in a decrease in accuracy Colour:silver Material:Metal Package Contents: 1 x Fish Tank Pressure Reducing Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.