The ZPure O2 Filter removes O2 from He, Ar, N2, H2, and methane to low ppb levels, with very high capacity in a compact package. The ZPure O2 Filter is available with standard compression fittings or quick connect fittings in 1/4" and 1/8" brass and stainless steel. This item requires hazardous shipping. Please refer to the SDS Document for more information.