Pre-Filled & Disposal! The Easiest and Most Accurate Method of Serving a Vehicle’s A/C System with Dye! Service multiple systems with just one connection per system. FEATURES: 8 oz (237 ml) cartridge Multi-dose, services up to 64 vehicles Kit Includes: TP9725-8 BigEZ™ R-1234yf/PAG cartridge TP-9749 EZ-Shot™ caulking gun-style dye injector assembly 128021 R-1234yf hose/coupler & purge fitting .