Pololu Romi Chassis Kit, Black - Differential-Drive Robot Base with Motors, Wheels and Caster

Specs: Size 163 x 149 x 70 mm; weight 160 g without batteries; plastic components black, wheels and ball white (per Pololu description for the black kit); differential-drive platform. RobotShop describes the same kit family as 6.5 in / 165 mm diameter class - FLAG, 163 x 149 mm (Pololu) vs 165 mm diameter (RobotShop) are not identical, use Pololu 163 x 149 x 70 mm.

Compatibility: General-purpose mounting holes/slots for electronics; designed around the Pololu Romi ecosystem (motors/wheels/caster in kit). No specific Arduino/Pi board included or claimed as fitted in Pololu spec text.

Power: No power spec verified for the kit itself; battery contacts for 6x AA (batteries not included, per RobotShop description).

Package contents: Pololu verified: two motors, two wheels, one ball caster and battery contacts - all basic mechanical parts to get running. RobotShop adds: two mini plastic gearmotors with extended backshafts, pair of white 70 x 8 mm wheels, red Romi ball caster kit, battery-contact set for 6x AA (batteries not included). FLAG/CONFLICT: Pololu 3D-model note says the assembled model includes a front ball caster that is sold separately from the Romi Chassis Kit - conflicts with the kit description saying a ball caster is included. Do NOT promise a second/front caster; list only one ball caster and verify with Pololu before listing. FLAG: motor gear ratio, voltage and speed NOT given on the fetched Pololu spec page - do NOT copy Romi motor specs from another kit.