Vintage 1974 Interdynamics Instant Electronic Rear Window Defroster & Defogger w/ Illuminated Switch All Metal Grid Defroster Looks & Performs Like Original Equipment Self Adhering Solid Metal Electronic Grid; Bonds Directly to Glass; No Plastic Sheild Attractive Dashboard Switch For Fingertip Control Easy To Install; Operates On All 12 Volt Systems Fits All American & Foreign Cars; Large Grid: 12" x 33"