Made of break-resistant Plexiglas. These brilliant highly reflective round reflectors can be seen at great distances for safety. You can use these reflectors for a mulitude of projects, like attaching to motor vehicles, trailers, scooters, property entrances, fencing, tractors, farming equipment, motorcycles, homes, office buildings etc. roadside stakes, garage door, driveway, traffic signs, etc. The bracket mounted reflectors are S.A.E Approved and can be attached with nails, screws or bolts. 3 1/4" Diameter. Two Reflectors per order The Self-adhesive reflectors are attached by simply peeling off the protective backing and pressing on to any clean, dry surface. Reflectors are 3.25" Diameter. Two Reflectors per order Reflectors: Blue Bracket Mounted, Blue Self- Adhesive, Red Bracket Mounted, Red Self- Adhesive, Orange Bracket Mounted, White Bracket Mounted, White Self- Adhesive.