1.UL and CE certification 2.Delivery time:20 days 3.Good service after sale 4.competitive price in this line We use 100% 3A molecular sieve core in the filter drier, with strong drying capability to reduce the risk of hydrolyze acid reaction. It can be uesd with HFC refrigerant (R134A, R404A, R410A)with POE and PAG oil together. This product is also an additive, compatible without consuming oil. ...