Astro Optics model no. CM-1 is designed to provide obvious, easy to follow delineation of all median curbs along or around traffic, divisional and channelizing islands. The CM-1 features precision molded prisms that are hermetically sealed to provide a brilliant signal from raised curb barriers under all weather conditions. Features 1.5 square inch reflective area. Ideal for delineating median curbs, approach ends, divisional islands, channelizing islands and parking lot curbs.   Additional Product Specifications: Specification Value Approx. Size: 3 7/16" x 2 1/4" x 3/4" Effective Reflex Area: Approx. 1.5 square inches Material: Meeting federal requirements Housing: Acrylonitrile butadiene styrene (ABS) Reflector: Methyl methacrylate (Acrylic) Standard Colors: Amber and Crystal, others on request Photometric Performance: Ask us for report