Exervo UltruBead Pro Foam Roller For Muscle Physical Therapy, Extra High Density Full Round, Yellow All new, 100% UltruBead microbead high density performance heat molded foam roller Firmness Scale: Level 6- Very Firm for maximum focal pressure. Little to no give at the surface. Not recommended for beginners 36" roller includes all new POSI ROLL Grip Bands for better traction & less slipping on smooth floors. POSI ROLL Grip Bands not included with 18" version Made in USA- safe, quality assured materials and production. 36" roller is fully molded, 18" ROLLER IS CUT FROM A 36" ROLLER meaning one end has a molded radius and the other a straight cut Warranty- 5 years home or commercial warranty. Used by teams like the US Naval Academy