Pololu Ball Caster with 3/8" Metal Ball

Small, plastic support ball, 3/8" diameter (approx. 9.5 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 950

Small, plastic support ball, 1/2" diameter (approx. 12.7 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 952

Small, metal support ball, 1/2" diameter (approx. 12.7 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 953

Small, plastic support ball, 3/4" diameter (approx. 19 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 954

Small, metal support ball, 3/4" diameter (approx. 19 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 955

Small, plastic support ball, 1" diameter (25.4 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 952

Support ball with a diameter of 1/2" (12.7 mm) designed for mobile robots Pololu 3pi and Pololu 3pi+ 32U4. Pololu 957

A supporting ball from the Tamiya educational series placed on metal rollers in a plastic housing. Pololu 66

Solarbotics RW2 wheel with black aluminum hub and thick silicone rubber tire. Provides maximum grip. Pololu 642

Pololu Universal Aluminum Mounting Hub for 3mm Shaft Pair, 2-56 Holes

A set of two Pololu wheels measuring 32x7mm in white. Fits D-shaped shaft with a diameter of 3mm. Pololu 1088