1.UL and CE certification 2.Delivery time:20 days 3.Good service after sale 4.Competitive price in this line SFK series reversible heat pump liquid line filter-drier, using high-quality compression of small spherical particles sintered desiccant module, combined with high-density filter cloth, each end of the installation of a non-reflux valve can reverse Impurities, to the role of drying filter, ...