This ceramic jiggle bar reflector measures 6 inches, and is available in white or yellow. It is sold by the box of 20, and available with or without a reflective lens. Reflective lenses can be one-way or two-way reflective. Ceramic jiggle bar reflectors can be used to create rumble strips for traffic calming. Can be adhered to asphalt with either epoxy or butyl pads (sold separately). Please call for more info on our jiggle bar reflectors.