Features and Benefits: * Disposable dye cartridge * BigEZ 8 oz. R-134a/PAG dye cartridge services up to 64 vehicles * BigEZ cartridges are prefilled with solvent-free A/C dye, certified to meet SAE J2297 and calibrated for exact dosing Durable construction-Built to last. The unique design allows it to be used with caulking-gun type injectors. Caulking Gun Cartridges DO NOT Fit the BigEZ Dye Injector.