The HiMag Surface Wave Absorbers from Western Rubber & Supply are thin sheets that attenuate traveling wave energy at frequencies from 1 GHz to 20 GHz. They have been designed to absorm microwave energy in high performance applications, while maintaining the desirable characteristics of elastomeric binders. The material is tough and can survive outdoor exposure. They are available in standard sheet sizes measuing 20" x 20" (564 x 564mm) and 24" x 24" (769 x 769mm).