Useful in emergencies, routing, signaling or for any mirror application, this mirror is highly reflective 0.25“ (6.3 mm) laminated glass. It also has Sight-Grid retroreflective mesh for aiming reflectedlight flashes with pin-point accuracy. (a see-through grid to look and target the area to reflect light) Dimensions: 2” x 3” (5.1 cm x 7.6 cm)