ECHOMASTER RADAR REFLECTOR insures ships of seeing you in low visibility conditions. Full 12.5" diameter circular reflector plates provide 11 square meter maximum effective radar cross section in the X or 3 cm band. Offers equivalent radar cross section of conventional triangular plate reflector with approximate 17" diagonal dimension. Marine grade aluminum circular plates. Minimized flexing. Dimpled to minimize distortion. Tough injection molded, captive corner latches assure minimum angle error. Reduced aerodynamic drag. Allows for assembly around a backstay. Quick to assemble and demount. Stows flat. Booklet included. Deluxe model comes with mounting system with all marine grade hardware, provides 360 degree detection, with permanent heavy gauge vinyl case. Anodized.