Minder Research TireMinder TMFLOWTHRU Flow-Through Adapter - 2 Pack Compatible with all TireMinder systems (TMG400C, TM55, TM66 and A1A) Plug and play - no setup required, just attach the transmitter and their ready to go Includes: 2 TireMinder Flow-Through Adapters, 2 Hexagonal Locking Rings, 2 Caps, 1 Locking Wrench and Valve Core Tool Chrome platted For use with metal valve stems only