Diamond Shape, 24"X48" (used in association with other shapes).Heavy-duty vinyl coated nylon fabric. Stainless steel framing. Fully collapsible when stored. Simplicity of design offers rapid and rigid display when required. Day Signals or Day Shapes are used for communication . There are five types of day shapes: Circle, Diamond, Cone Apex Pointed Up, Cone Apex Pointed Down, and a Cylinder. All day shapes are Black in color. See the USCG Navigational Rules., Lot of 1