25x Schrader Schroeder DIll Port Valve Core Replacement All Refrigerant HVAC

This is a BRAND NEW25 Pack (25x) of Schrader Valve Replacement Cores. They have a teflon seal which is 10x more durable than traditional rubber. They are American Standard size (1/4" m flare) and are used for all refrigerants and by all manufacturers. A valve core is a moving part within the service valves and they can be damaged. When this happens they cannot make a proper seal and a leak is created. Once this happens you need to replace the valve core (seen in the picture). For help doing this without evacuating your system search our store for a "Dual Schrader Valve Core Remover Tool". Thanks for looking and good luck!