Features: This valve core kit is suitable for HVAC technicians, auto repair professionals, and DIY users who need a reliable solution for air conditioning maintenance. Whether for regular inspection, emergency replacement, or long-term servicing, the complete set provides components to support efficient and accurate work. Specifications: Material: Valve Core Removal Tool: aluminum Alloy Valve Cores: metal Valve Caps: plastic with Built-in Sealing Gasket Color: silver, gold, blue, red Package includes: 1 x Dual head valve core removal installer tool 20 x R12 valve cores 8 x R134a valve cores 5 x R1234yf valve cores 8 x Car AC caps Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays