80mm K 80x37mm Mecanum Omni Directional Wheel for TT Motors (Set of 4pcs) Wearable Battery This module is an excellent 433MHz RF module This module is an excellent choice for those looking to implement wireless communication in their projects with ease and reliability our ultra flexible silicone wires are suitable for a wide range of uses Parameter Value Wheel Diameter 80 mm Wheel Width 37 mm Roller Angle 45° Roller Material Rubber Wheel Material High strength plastic Bore Type Compatible with TT Motor D shaft Load Capacity Light duty (for small robots) Set Includes 4 Wheels (2 Left + 2 Right) and diagonally — without changing its orientation