This kit contains beltlines & glass runs. The belts are made from a rubber covered stainless steel core with a felt lining. They clip on to the doors and fit the inner & outer of both the driver & passenger doors. This glass run channel is made from premium EPDM felt lined rubber to allow the door glass to roll up & down freely. Presses into the top, back & division bar section of the glass channel and seals out wind noise, moisture & drafts. This installs on both the driver & passenger side.