AC System Valve Stem Core, Replacement Parts Compact Good Compatibility 50 Pieces Auto Air Conditioning Valve Core for

["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 .","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 .","STANDARD SIZE : These valve stem cores have standard threads and sizes for easy installation and disassembly , can quickly replace the old valve cores .","GOOD COMPATIBILITY : Auto air conditioner high pressure valve stem core , suitable for R134 series , compatible with most automobile air conditioning systems .","50PCS IN 1 SET : Includes 50pcs of air conditioner high pressure valve cores , which is sufficient for easy installation and replacement , has strong practicability ."]