Grommet Apparatus

A grommet apparatus is provided for the passage of lines through a substantially slot-shaped component opening. The grommet apparatus includes, among other things, a tubular, resiliently expandable cable passage portion extending along a central axis between a first end and a second end and a connection portion having a flange-like edge region surrounding the cable passage portion circumferentially for fastening the grommet apparatus in the component opening, comprising at least a plurality of first stiffening ribs that extend radially aligned outwardly circumferentially while being spaced apart from one another from one end of the cable passage portion to the central axis.