Product information "Pololu 5" Robot Chassis RRC04A Solid Red"
The 5" robot chassis RRC04A is an 1/8" acrylic chassis that provides a base for our micro metal gearmotors, extended brackets, and 42×19mm wheels. The robot chassis has many mounting holes that let you mount a variety of robot components to it. With a diameter of only five inches, this acrylic chassis is great for building robots capable of navigating tight spaces.
The RRC04A robot chassis is available in a variety of colored (and clear) acrylics: