Feature:1. GOOD COMPATIBILITY: Auto air conditioner high pressure valve stem core, suitable for R134 series, compatible with most automobile air conditioning systems.2. COPPER MATERIAL: This valve stem core is made of copper, sturdy and compact, not easy to break or deform, and has a decent compressive ability.3. EASY INSTALLATION: These automobile air conditioning valve core is easy to use, there is no need for extra installation tools, suitable for long term use.4. STANDARD SIZE: These valve stem cores have standard threads and sizes for easy installation and disassembly, can quickly replace the old valve cores.5. 50PCS IN 1 SET: Includes 50pcs of air conditioner high pressure valve cores, which is sufficient for easy installation and replacement, has strong practicability.Specification:Item Type: Car Air Conditioning Valve CoreMaterial: Aluminium Alloy, CopperProduct Length: Approx. 19.93mm or 0.8inApplication: Universal for R134 auto air conditioner high pressure valve, applicable to most auto air conditioners.Package List:50 x Valve Core