Execute Smooth Tracking Shots | 2" Ball Bearing Metal / Rubber Wheels | Fits Any Tripod * 33 lb Load Capacity | Adjustable Diameter | 31" Doorway Width * Compact - Folds to Just 17 x 5" | Step-On Locks for Wheels | Carry Handle * Hook & Loop Leg Strap * Whats In The Box: Hook & Loop Strap, Carry Bag with Shoulder Strap, 1 Year Limited Warranty