The best screw-on-top reflector option available is The Smarty from Prestige Flag. At only 2" high and 3/4" wide, The Smarty is nearly invisible at the top of the flagstick.

Range Finder
  • Five corner cube reflectors precisely arranged to provide 360° reflectivity
  • Easy installation - simply screw onto the top of existing flagsticks
  • Designed for durability
  • Color - black
  • Thread size 3/8"-24