FITMENT – ATV Scooter Street Bike Cruiser Touring Motorcycle (Note – If your modle don’t have a mirror mount or clamp, it cannot be installed directly) BOLT THREAD SIZE – Universal Motorcycle Mirrors 10MM 8MM ( 2 x 8mm & 10mm Standard Bolts, 1 x 8mm & 10mm Reverse Bolt ). Please check the sixth products picture, it will display the install instructions COMPONENTS – rear view mirrors for motorcycles used ABS Injection Molded Housing, HD Glass and Steel Stem. BASIC FUNCTION – This rear view mirror to increase the driver’s awareness and field of vision and to remove blind spots by allowing the driver to see the vehicles and conditions behind him, and it have extremely Bright Long Lasting Turn Signals. BEST VISION POSTION – Set the Left Mirror to see What is Behind you and Set the Other Mirror for What is in your Rear-Three-Quarters Vision Motorcycle Mirrors Specification Material: ABS Injection Molded Housing, HD Glass