aluminum alloy and rubber and firm, shockproof and stable Small shape and compact size, it is easy and for us to take and carry Suitable for outdoor activities, travelling and so on Easy and for us to install and remove It is suitable for Zumo 400 / 450 / 500 / 550 / 660, for 2 / for Navigation Holder, for motorcycle or bicycle holder Square Mounting Base with Ball Head only, other accessories demo in the picture is not included