Warning: R-438A is restricted in California New York. As of January 1, 2025, the sale of R-438A is prohibited because its Global Warming Potential. Single and Bulk available Residential and commercial air conditioning systems (rooftop and indoor packages units, direct expansion chillers, split systems) Low- and medium-temperature refrigeration systems (self-contained and rack systems, condensing units) Refrigerant Type: MO99 (R-438) Net Weight: 25 Lbs. Refrigerant Compatibility: R-22 Refrigerants Center keeps high-volume inventory ready to ship including our best-selling options: R-454B, R-410A, R-134A, R-22, R-32, R-404A, R-422B (NU-22) and R1234yf for a wide range of HVAC and Automotive systems.