Usage Tips: Description:brand and high quality. Feature:Made of high-quality aluminum alloy and rubber material, durable and firm, shockproof and stable, Small shape and compact size, it is easy and convenient for us to take and carry.Suitable for outdoor activities, trelling and so on.Easy and convenient for us to install and remove.It is suitable for Zumo 400/450/500/550/660, for Rider 2/for Urban Rider GPS Nigation Holder, for motorcycle or bicycle holder.Square Mounting Base with Ball for Head only, other accessories demo in the picture is not included Specifications:Item Type: Square Mounting BaseMaterial: Aluminum Alloy+RubberSize: 50x42mm/1.9x1.6inColor: Black/Silver/red/blue (optional)Quantity: 1 Pc Note:No retail package.Transition: 1cm=10mm=0.39inchPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes:1 x Square Mounting Base with Ball for Head