Quick view Pro-Cart Multi-Top Accessory (for AT1 and AT2) Omni Cubed $250.00 The Pro-Cart Multi-Top Accessory enables transportation of multiple countertops simultaneously on any Omni Cubed Pro-Cart for increased efficiency, and have an innovative, balanced design to prevent tipping. Uprights provide elongated... Out of stock! Please check back soon, or contact us to backorder.