Appearance of the real tyre (JMP-BP-1261 includes one tyre, and JMP-BP-1264 includes four.) Product Features The omni wheel moves in any direction easily. It is economical and space saving to use a single wheel; while combining two wheels together will make the move more smoothly, for the gap of the single wheel is offset. Application It is fit for use in soccer match, firefighting in maze, etc. Specification diameter: 58mm; thickness: 14mm