This purchase contains a full step by step guide on how to convert your Toyota Celica (fifth generation 1990-1993) from r-12 refrigerant to the cheaper and environmentally safe r-134a. What you will recieve when you purchase this is all the parts needed to get this job done correctly and properly so that your ac system is properly converted and blows nice ice cold air reliably. I have personally done this on my 1991 Toyota Celica 1.6L and any years I listed had the same ac setup so there will be no issues in different styles. I will give you a step by step guide and help you every step of the way so that you don’t have to struggle through it all day like I did. If have any questions don’t be afraid to ask thanks!