Sturdy, aluminum construction. The inclined plane 10 X 60cm. is hinged to a base, 10 X 45 cm. an aluminum arc scale, which can be mounted on the plane, is graduated to measure the angle of inclination from 0-45°, and vertical height to 25cm. a linear scale, graduated in cm, is attached to one side of the inclined to measure distances along its plane. A 5-cm pulley, along with mounting clamp and rod is fully adjustable. Complete with cylindrical roller with hook. With instructions.