Enough supplies for 360 pairs of large wheels with rubber bands!
Packed into bags of 20 wheels, 20 rubber bands, 10 dowels (36 bags per case)
Ideal for science and engineering projects! These wheels are designed to make your rubber band-powered vehicles and mousetrap cars perform the way you expect 
Extra materials included! Each order comes with rubber bands to add traction and 1/4" dowels 
Easy to work with! If you've built a car project with CDs for wheels, you know what a hassle that is. These wheels fit snugly onto sturdy wooden dowels - easy for kids to use! 
Wheels measure 4.75" in diameter and 1/4" wide tread. Axel hole inner diameter is 1/4". The dowels are 1/4x6". The rubber bands are 1/8x3.5". 
Made of sturdy, safe, reusable, and recyclable (#5) polypropylene plastic.