55-59 Chevy/GMC Truck Door Beltline 4 Piece Kit for 1-PC Glass. This kit is designed for trucks where the vent windows have been removed and replaced with 1-PC glass. The beltlines mount to the door and squeeze the glass to reduce rattles and noise levels. They are made from premium quality, OEM grade, ozone resistant materials. This door channel kit does both drivers and passengers side doors. Limited Lifetime Manufacture Warranty.