3M(TM) Diamond Grade(TM) Flexible Prismatic School Bus Markings Series 973 are highly retroreflective flexible microprismatic markings designed to improve the visibility of school buses to approaching drivers. This reflective marking is backed with an aggressive, pressure-sensitive adhesive. Available in 1" and 2" x 50 yd continuous rolls and kiss cut pieces on a roll for easy application. Required by the school transportation standards, this product meets and exceeds FMVSS 217 and 131, CSA D250 (Canada).