If more customer application description, please contact omniwheel(at)hangfa.com (1 )CMA Series features CMA series Omni wheel is 45-degree big load capacity Omni wheel. Wheel hub is steel , perfect stable and precise. And 4 bearings are embedded in every driven wheel, making rolling smooth. There are two types of 45-degree Omni Wheel : left and right . Two left and two right Omni wheels constitute a basic 45-degree Omni Wheel driving system. 45-degree Omni wheel, compare to 90-degree ,has a higher stability in same size platform, because four 45-degree Omni wheels could use parallel arrangement on platform. 203.2mm mecanum wheel mobile robot with steel hub and polyurethane roller (2)CMA-20A Specifications: *Model Number: CMA-20A *Diameter: 203.2mm *Width: 110mm *Number of Rollers: 8 *Hub Material: Aluminum *Roller Material: Polyurethane *Hole size: 45m *Load Capacity: 240Kg (3)Application: robots , mobile robot platform , AGV in workhouse and warehouse, scientific research , aerospace industry, ELECTRIC OMNI MOVING show equipment on stage or show cars, wheelchair and so on (4)Advantages: 1.Making turning fast 2.Omni directional movement and rotation 3.Superior load capacity (5)Packaging and shipping: piece/ carton, the quantity is as your order by DHL or FEDEX or EMS express (door to door ), or by sea , or as customers' requirement (6)Certificate of honor High-tech enterprises ISO9001 Quality Management System cerification (7)Related patents ZL201120121753.X ZL201120121743.6 ZL201120121754.4 ZL201130086552.6 If any question, please contact omniwheel(at)hangfa.com, Lisa