The Pitsco 40206 TETRIX PRIME Square Beams have four-sided, heavy-duty aluminum beams that are the structural building blocks for creating with the TETRIX PRIME Building System. They come in seven lengths to provide you with flexible building options, and the beams can be cut to custom lengths with a metal-cutting blade.Aluminum resists corrosion and tarnishing, and is lightweight. The beams measure 16 mm x 16 mm x 208 mm. TETRIX products reinforce science, technology, engineering, and mathematics (STEM) concepts for students 12 and up studying robotics and building a working robot that demonstrates engineering, simple machines, force, and Newton's laws of motion. Science education products incorporate applied math and science principles into classroom and homeschool-based projects. Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities. Science education projects include a broad range of activities, such as practical experiments in engineering, aeronautics, robotics, energy, chemistry, physics, biology, and geology.Pitsco Education develops K-12 science, technology, engineering, and math (STEM) curriculum, educational kits, and classroom tools. The company, founded in 1971, is headquartered in Pittsburg, KS.