Planet Bike 3043 Spok LED Micro Tail Light Made using sustainable methods Made using high quality materials Tested to ensure quality and durability Planet bike spok LED micro taillight Spok headlights fit bars, seatpost, headtubes and helmets, keychain hole Nylon hook and loop adjustable velcro strap New nichia extreme 2.0 LED is 4x brighter than its predecessor Be safe, Be seen