Features 1.Flexible Rollers: 38mm omni wheel is made of aluminum alloy materials and has 8 rollers coated with PU. The rollers are more durable, firm and flexible. It can easily realize 360 degree movement of the wheels and is suitable for different environments. 2.Double Aluminum Omni Wheel: 38mm (1.5 inches) double aluminum omni wheels are the smallest omnidirectional wheels among all our aluminum omnidirectional wheels. They are unique because they can roll freely in two directions. 3.Scope of Application: 38mm omni directional wheel can carry aluminum plate, which is used for ground and inverted applications, and is suitable for small robot cars, robot platforms, small toys, etc. 4.With Metal Hub and Wrench: Metal hub and wrench make the omni directional wheel more solid, the fixed direction is clear, the installation selection is simple and stable, and the load stability is excellent. 5.Good Workmanship: 38mm omni wheel with exquisite workmanship and beautiful appearance, can provide you great using experience. Specification Item Type: 38mm Omni Wheel Material: Aluminum Alloy, PU Product Color: Silver Black Weight: Approx. 33g / 1.2oz Product Size: Wheel Diameter: Approx. 38mm / 1.5in Wheel Width: Approx. 23mm / 0.9in Wheel Aperture: Approx. 4mm / 0.2in Number of Boards: 2 Number of Rollers: 8 Load Capacity: Approx. 2kg / 4.4lb Application: Suitable for Small Robot Cars, Robot Platforms, Small Toys, etc. Package List 1 x 38mm Omni Wheel 1 x Wrench