Panel and Enclosure Grommets: Type - Grommet, Standard; Mtg Hole Dia.- in - 1.375 in; Mtg Hole Dia.- mm - 34.9 mm; Grommet Inside Dia.- in - 1.000"; Grommet Inside Dia.- mm - 25.4 mm; Max. Panel Thickness - 0.063" (1.6 mm); Height - overall thickness - 0.438" (11.1 mm); Head Diameter - 1.750" (44.5 mm); Installation - Push-In One-Piece; Material - Rubber; Color-Finish - Black; Temperature Rating - 105 deg C (221 deg F) Max.; Material Specification - SBR (Styrene Butadiene); Listing Description - RG 1375-32-2