This 1" maprail flag holder is made for Ghent's 1" (sold separately). Ghent's 1" maprails feature a durable aluminum rail with a self-healing cork posting strip. When added to a chalk or marker board, these display rails provide an organized way to hang flags, teachers aids, or charts. Details: 1" (2.54 cm) holder sizePerfect tack surface when space is limitedFor use with Ghent's 1" (2.54 cm) maprails