Foam Roller Ball Material: 100% EVA Diameter: 5 inches | 12.5 cm Firmness: 8/10 Effectively roll out trigger points and muscle tightness in large muscle groups ✔ Deep Tissue Massage ✔ Gentle Tissue & Scar Tissue Massage ✔ Shoulders, Chest, Lats, Lower back, Glutes, Quads, Hamstrings, Calves ✔ Floor ✔ Full Body Weight | Spiky Ball (Medium/Soft) Material: 100% PVC Diameter: 3.5 inches | 9cm Hardness: Warm 5/10 | Cold 8/10 Spikes reach deeper into the fascia for tension release and increased blood flow ✔ Foot Massage & Plantar Fasciitis ✔ Gentle Tissue & Deep Tissue Massage ✔ Reflexology & Sensory Therapy ✔ Feet, Hands, Forearms, Calves, Shoulders, Neck ✔ Floor, Chair ✔ Full Body Weight | Peanut Ball Material: 100% EPP Diameter: 3 x 6 inches | 8 x 16cm Firmness: 8/10 Safely massage the muscle groups around the spine and other connective tissues ✔ Gentle Tissue Massage ✔ Thoracic Spine Massage ✔ Neck, Spine, Hips, Upper arms, Forearms ✔ Floor, Wall ✔ Full Body Weight | Smooth Ball Material: 100% Silica Gel Rubber Diameter: 2.6 inches | 6.5cm Firmness: 9/10 Optimal size for precise targeting and penetration. Firm grip against wood floors, walls or your skin ✔ Gentle & Deep Tissue Massage ✔ Acupressure ✔ Shoulders, Back, Chest, Glutes, Legs, Hips, Forearms, Head, Hands ✔ Floor, Chair, Wall ✔ Full Body Weight |