Assorted pack of pulleys from TeacherGeek. Featuring splined holes to push and rotate with a dowel shaft, and notches to conveniently secure all sorts of belts (rubber bands, string or wire), easily evolve designs and expand experiments (no hot glue necessary). They transfer impressive amounts of power, while remaining simple enough for elementary use. Whether in our tinker set or as part of a larger STEM, science fair or engineering project, TeacherGeek pulleys are the preferred choice. Pulley colors may vary. Contains ten of the following sizes: 70mm, 55.5mm, 25.5mm, 9mm
Sold in packs of 40.