Boardwalk Flash Forty Disposable Dustmop is a 40 ft continuous roll of disposable dust mop heads. Simply open the dispenser, extend the roll, and cut the length that fits the size of your dust mop frame. The backing has spaced slot pockets so that one inventory fits multiple frame sizes. An economical dust mop for situations where you need to dispose after one cleaning. Each carton contains a razor knife for cutting.