The world’s most popular and professional injection method. Pull the trigger to inject a precise amount of oil into the A/C system and you’re done. Allows for compliance with J2843 Standard (separate oil injection). For use in R-1234yf systems. Includes: Spotgun injector with R-1234yf hose adapter assembly PAG 46 HFO oil cartridge (8 oz/240 ml) All new box with fitted insert Excellent for use with SAE certified A/C equipment Lifetime warranty on every injection gun.