BACKORDERED 1-22-22*** Here is a set of Parker Hannifin (they supplied the couplers and dust caps to Meyer originally with the E-47 PA Block they manufactured for Meyer) dust caps for your couplers on some Meyer E-47, E-57, and some E-60 pumps "some" because dust caps are not used with swivel hoses. Fits most 1/4" quick couplers. The Couplers pictured ARE NOT INCLUDED and are for display purposes only. Again, THE COUPLERS ARE NOT INCLUDED. These are not the hard plastic type, they are pliable rubber.