Kit 4 pieces 2 wheels and 2 TT motors Realized in high quality material, resistant and practical to use. Components Kit 2x wheels 2x TT motors TT motor specifications This is a TT DC motor with a gear ratio of 1:48  Comes with 2 x 200mm wire with 2.54mm (0.1") male connectors compatible with breadboard. Perfect for connecting to a breadboard or terminal blocks Nominal voltage: 3 ~ 6 V. Current continuous idle: 150mA +/- 10%  Min.Operating speed (3 V): 90 +/- 10% RPM Min.Operating speed (6 V): 200 +/- 10% RPM Torque: 0, 15 Nm ~ 0.60 Nm Stall torque (6V): 0.8kg .cm (approx.)  Transmission ratio: 1:48  Body size: 70 x 22 x 18mm (approx.) Wire length: 200 mm 28 AWG Product weight: 29g / 1.02oz (approx.)    Wheel specifications Wheel diameter: 65 mm (approx.) Wheel thickness: 28 mm (approx.)