Give your students an inclined plane that is straight as an arrow, a full 4 feet long and will last for years. It’s nickel-plated heavy steel with rounded corners and can accommodate any kind of car you choose. Holes in the supporting flanges fit a 10mm support rod. We add a 40mm molded styrene pulley on a metal bracket to be mounted in a hole at one end. You will also need a car, cord, support stand and rod with clamp, and a weight pan or hanger. With instructions. Size: 120 x 13 x 2.5cm.