We can supply quality frl units.. frl units:1) Thread diameters: M5 1/8", 1/4", 3/8", 1/2", 1"2) Operation pressure: 0 - 1Mpa3) Temperature: 0 - 60oC4) Air source treatment units include filters, regulators, filter regulators, lubricators,or their combined dyad or triplet5) In standard modular design and can freely separate and combine*AC.BC frl units