Cabinet Glossary
What is a Filler Strip?

A filler strip is a piece of wood or plastic that is used to cover an opening or gaps in woodworking. Filler strips may be fluted or beaded.
A cabinet filler is a narrow strip finished to match the cabinets and used to close a gap between a cabinet and a wall or between two cabinets. Standard cabinets are usually sold in 3-inch width increments, while walls rarely fit those measurements exactly, so the filler is cut on site to fit the remaining space. It also gives doors and drawers enough clearance to open without hitting a wall, handle or neighboring cabinet. Cabinet fillers are commonly a few inches wide and may be plain, fluted, beaded or reversible. They are fastened to the cabinet beside them and blend into the finished cabinet run.