About JB Tools. FJC 2610 OE R134a Primary High Side A/C Seal. FJC 2738 R134a Flow Through Oil Injector. FJC 2750 Master Valve Core Remover/Installer. FJC 4073 Slim Line Sealing Washer. If you receive a defective product, so long as the Limitations found within JB Tools?.
