Best Glide ASE Emergency Signal Mirror The Best Glide ASE Compact Emergency Signal Mirror is a durable, compact, metal signal mirror that won't crack like the plastic or acrylic mirrors. Furthermore, the Stainless Steel construction is more reflective than the plastic or acrylic mirror. The Best Glide ASE Compact Emergency Signal Mirror utilizes a hole in the center to aim your reflection. It also includes instructions printed on the back. The Best Glide ASE Compact Emergency Signal Mirror measures approx 2 x 1.5 inches and weighs less than 1 ounce. It is small enough to fit into your wallet, coin purse, or pocket.