Robot Wheel 65mm + Metal Coupler 4mm

From the shop's description

Robot Wheel 65mm + Metal Coupler 4mm is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. These are typical rubber wheels for small robot mobile platforms. The tire is soft black rubber with light tread for added traction in rugged terrain. Specifications: Outer diameter of wheel: 65mm Width: 28mm Brass coupler inner diameter: 4mm Hub color: Silver or Blue Package List: 1x Robot Wheel 65mm 1x Metal Coupler 4mm It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.