10 GM Door Panel Retainer With Sealer White Nylon (GM # 11519031) by A Plus Parts House GM Door Panel Retainer With Sealer White Nylon White Nylon Top Head Diameter: 19.5MM, Bottom Head Diameter: 18.5MM, Stem Diameter: 11MM, Stem Length: 17MM GM # 11519031 (Hummer H2 2003 - On)