Exervo EnduraBead And UltruBead Exercise Foam Roller Set For Back & Body Physical Therapy - 2 Rollers 36" x 6" Full Round - Made in USA Molded microbead foam for outstanding durability Firmness Scale: Level 5- Extra Firm EnduraBead & Level 6- Very Firm UltruBead Popular with athletes, trainers, crosstrainers & experienced foam roller users Lasts 3-4 times longer than extruded cell foam Quality assured materials & craftsmanship - Made in USA