A. Durable. B. Made of deep groove bearing steel with a relatively high load - carrying capacity. C. Widely applicable, cost - effective and compliant with relevant standards. D. Exhibits smaller friction, higher rotation speed and greater durability. E. Special non - contact double rubber seals can help prevent dust from entering and enable relatively frictionless operation. F. Relatively easy to install and replace. G. Applicable vehicle models: - 4 TRX4 1/10 RC climbing vehicle H. Tool supplies classification: Assembly category I. Remote - controlled vehicle parts and accessories: Servo accessories J. Use: Vehicles and remote - controlled toys K. Technical parameter value: 2 L. Remote - controlled peripherals/equipment: Receiver M. Applicable vehicle model type: Automobile N. Four - wheel drive: Components O. Wheelbase: Screws P. Color: Black Q. Material: Steel + Rubber R. Package contents: - 2 ball bearings (15x21x4 mm) - 2 ball bearings (12x18x4 mm) - 4 ball bearings (10x15x4 mm) - 2 ball bearings (7x14x5 mm) - 6 ball bearings (6x13x5 mm) - 4 ball bearings (6x12x4 mm) - 2 ball bearings (5x11x4 mm) - 4 ball bearings (4x10x4 mm) S. Only the above package contents are included, and other products are not typically included. T. Note: Light reflection and different monitors may cause slight differences between the color of the items in the picture and the actual object. A measurement error of +/- 1 - 3 cm is generally allowed.