This instrument is a teaching tool to study the model of random phenomena, the statistical regularity of distribution to explain the gas molecule movement rates .. Incredible tool for physical laboratory equipment or as a decoration in your laboratory that make learning physics experiments efficiently .. With this instrument, the statistical tool of statistical regularity of the velocity distribution is explained by gas molecules .. The instrument consists of a plexiglass plate, an array of nails, a V-shaped groove, an insert panel, a slot, and the like .. Well suited for use in schools, educational displays and collectibles. A great addition to your laboratory equipment.