This is a genuine  umarex brand co2 BULB seal from umarex usa..to fit these pistols        

Green CO2 Seal for Umarex T4E ++++ MAGAZINES

T4E PPQ .43                           TOLMAR P1  .43 

TPM9      .43

S & W  M+P9  .43                                          AUCTION IS FOR ONE SEAL

T4E TPM1    .43     

ALSO FITS SAME PISTOL IN 6MM AND 4.5MM