... the greatest capacity and drying effect of drying filter core.Suitable for refrigerant: R-12, R-22, R-134a, R-404a, R ... .. HW Series95% of molecular sieve,5% carbon.This type of drier core added the activated carbon, it suitable for Burn-off system ... can guarantee a large water absorption capacity of the drier filter core.Suitable for refrigerant: R-12, R-22, R-134a, R-404a ...