This kit provides replacement components for servicing the condenser's integrated receiver dryer. The IRD should be changed on an interval which can be found in the service manual as well as anytime the HVAC system is depressurized and opened to the atmosphere. This kit contains all of the required parts to make that service.For further details, reference media available at catpublications.com and SIS2.cat.com or contact your local Cat® Dealer.