This is the plastic off-white insert that goes in an aluminum extrusion. It is used for covering up the fasteners (rivets or screws) that hold up cabinets, shelves and bath units.
It is total width is 1-1/16". The exposed part after installation is about 15/16" wide.
It is sold by the foot. Lengths will be continuous up to 25 feet. If you order more than 25 feet we will have at least one break.