Cans R1234yf. In order to access the refrigerant, you will need a R1234yf left hand thread can taper.
Honeywell R1234YF HFO-1234yf Automotive Refrigerant - 8oz Can - 4 Pack
R1234yf, YF, Refrigerant Automotive A-C, 8 oz. the New Style Self-Sealing Can
HFO, R1234yf Refrigerant Automotive A/C, 3 Can Recharge Kit
R1234yf, Refrigerant Automotive A/C, (3) 8 oz. Self-Sealing Cans FAST SHIP
R1234yf, (2) 8 oz. Cans, Refrigerant Automotive Air Conditioning New Fast Ship