ESP 1MBGRB Polypropylene Heavy Weight Meltblown Maintenance Universal Absorbent Bonded Roll, 150' Length x 30" Width, Gray This roll is made from one layer of meltblown that is sonically bonded together Good value and reliable performance Made from high quality polypropylene Fire retardant as per ASTM 726 Measures 150-feet length by 30-inches width