N6541 Spring loaded, top mounting, self-adjusting, for retaining folding doors in closed position, manufactured by Acme. Features: -Door snugger. -Fits "Acme" series 2400 and 2900, 1" bi-fold track.. -Length: 2.25". -Doors: 4. -Mount: Top. -Adjustable: Yes. -Dimensions: 5.44" H x 0.63" W x 3.81" D.