OUR PERFORATED PIPE MARKER ROLLS ARE MADE OF FLEXIBLE, RESILIENT 6 MIL VINYL WITH A STRONG ADHESIVE BACKING. RESISTANT TO WEATHER, MOISTURE AND CORROSIVE CONDITIONS. DESIGNED FOR INDOOR AND OUTDOOR USE AND ADHERES TO MOST CLEAN, DRY SURFACES. EACH MARKER IS 1"X9" AND COMES 72/ROLL.