The RH Humidification Cover is for the gentle humidification of objects with humidified air supplied by an electronic ultrasonic humidifier. It is constructed of thermoformed 3mm thick acrylic sheet and matt black anodised aluminium frame. For easy storage, it folds away flat to just 30 mm thick and should be stored and transported in the zip folder supplied. Due to the pyramid shape, should any condensation form on the internal surface of the cover, it will run down to the outer edges of the cover and not drip on to the object being humidified