1 Pcs x Blue Low Side Quick Coupler, 1 Pcs x Red High Side Quick Coupler ,1Pcs Valve Core Remover,2Pcs Seal ,4Pcs R12 Valve Cores,2Pcs R134a Valve Cores. Easy Installation: Designed for quick and straightforward installation, this adapter kit simplifies the conversion process, making it accessible even for those with minimal technical expertise.