AIM X speed is 9. Rusty Bags / ACO Stamped speed is 5. STRONG-STITCHED DURABLE BAG: Bags are stitched using the strongest nylon thread on commercial sewing machines to add strength and durability for both indoor and outdoor play. Smaller Pro Resin. REGULATION SIZE WEIGHT: Sewn to 6 inches by 6 inches square and regulation 1.25 inches thick. All bags measured at a regulation weight of 1 lbs