Casio GzOne Commando compatible Bicycle Handlebar Cradle Mount _ Holder for Bike with Lifetime Warranty Cradle attaches to handle bars of any bike with tube diameters ranging from 1/2 - 1 1/8 inch (13-28mm). Unique rubber ribbed clamping system connects without the need of tools. Bike handlebar mounted base for the Casio GzOne Commando device. Cradle is designed to accommodate the specific dimensions (130.6 x 66.4 x 15.2 mm). Perfect for bikes (street or mountain) and also works great on motorcycles, ATV, 4-wheelers, golf carts, baby strollers, snowmobiles and more! Heavy duty foam inserts (1/2 inch thick) line grips on holder for a secure hold of device under a variety of riding conditions. Specifications: Holder Base: (2.5 X 4.0 inches in closed position. Highly expandable), Handlebar Mount (13-28mm tube diameter), Weight (Base 4oz., Mount 2oz.)