321 STRONG Foam Roller – Extra Firm High Density Deep Tissue Massager with Spinal Channel $17.29 – $30.84 Make sure this fits by entering your model number. 12.75 inches x 5.25 inch diameter , lightweight yet rugged solid core EVA massage roller with triple grid 3D massage zones mimics the finger , palm , and thumb of a therapist’s hands . Travel friendly at just 1 lb. . High density muscle roller is comfortable to use – so it’s great for beginners , and effective at penetrating the soft tissue layer of tired muscles . Firm enough to provide intense benefit to lower back injury , sciatica , or plantar fasciitis .