Finally a hand sanitizer/soap dispenser for outdoor! This is world's first rain-resistant, indoor/outdoor, automatic sanitizer/soap dispenser. It is designed to be mounted on a post, ideal for installations at parks, playgrounds, parking lots, shopping centers and other public areas outdoor. Fit any post size and shapes This unit comes with a clamp that can wrap around a post up to 1-3/4 inch (44 mm) diameter. You can purchase bigger clamps or zip ties for posts larger than 1-3/4 inch. Hose clamps or zip ties of various size are readily available at home centers or online. The unit can be mounted on post of any shape - round, square or oval. The tension will make the clamp adapt to any post shape.