Gas tank refill adapter with pressure relief valve BKZ15

Product name: Inflation valve for pressure relief black Model: BKZ15 Materials: Aluminum alloys and copper Weight: 36 g Unfolded: 95x16x30mm Storage: 56x16x30mm Features: Multiple unused gases can be recharged and reused interchangeably, when the pressure in the gas tank is too high, the valve can be closed and the pressure can be relieved with one click