Roll of plastic insert for slat wall slats, one roll is enough to fill the slots on one piece of slat wall. 1/st, this insert is designed to add a finishing touch to your slat wall display. These red plastic inserts simply slide into grooves of slat wall to hide exposed particle board and any mounting screws. It's easy to enhance any wall display presentation and helps to cover up blemishes in slat wall. Made of durable plastic.