Bike frame race numbers printed in full color on Ecoflex or Correx, Requires Twist Ties or Frame Mount. Waterproof and tear resistant plastic bike frame numbers. Prints two-sided. The frame numbers come complete with pre-punched holes for secure  attachment. (Correx board is a twin walled extruded polypropylene sheet material
with flutes. It could be described as a "plastic cardboard" and it is widely used for street posters.) This product is UCI compliant.