Item Type: Omnidirectional Wheel Diameter: 6in (152mm) Number of Side Wheels Per Wheel: 14 Number of Bearings Per Wheel: 28 Bearing Type: Rolling bearing Wheel Material: Silicone Wheel Hub Material: Aluminum alloy Wheel Hub Surface Treatment: Double layer high temperature baking paint Connection Form: Flat key or set screw Load Capacity Per Wheel: 30kg 1DOUBLE ROW MULTI SUBDIVISION DESIGN: Even if the user's frame accuracy is insufficient, the multi subdivision circumferential structure of the 127mm metal omnidirectional wheel allows it to always run smoothly, avoiding the shortcoming of severe up and down jitter of ordinary omnidirectional wheels 2SMALL WHEEL EMBEDDED WITH DUAL BEARING DESIGN: Each silicone wheel of the omni wheel is embedded with a miniature bearing. The sliding friction of the small wheel axle is transformed into rolling friction, so that the lateral movement is flexible and smooth, and the micro resistance performance of the lateral movement of the omnidirectional wheel is truly realized 3SPECIALLY SELECTED GOOD QUALITY SILICONE: The small wheel is made of specially selected good quality silicone, with a drum shaped design, right soft and hard, strong grip, and almost silent operation 4GOOD GRIP ON VARIOUS SURFACE: This omnidirectional wheel has a very good grip on the surface of wood, tile, carpet, etc. 5HIGH TEMPERATURE PAINT TREATMENT: The surface of the product is after high temperature paint treatment, beautiful and durablePlease match the appropriate design size before use.1 x SingleRowOmnidirectional Wheel