The apparatus is designed for demonstrating the principles of the parallelogram and polygon of forces  This product is similar to the wall type but is intended for use in laboratories where wall space is limited. A thick plywood pieces of thickness 12mm having dimension 45×30cm on a substantial wooden stand and supplied with 2 sets of z-pulleys and 3 sets of (50gms x 5) slotted weights, 5 No. Drawing sheets, but without cord.