High Density Spiky Massage Ball, Pack of 5, Hard Soft Combo, Stress Reflexology, Trigger Point Plantar Fasciitis Pack of 5 spiky massage balls: Hard & Soft ball Combo is designed to provide different levels of stimulation according to users' preference Made from EU approved phthalates free PVC & contains no heavy metal elements. Safe to use Designed to deep tissue massage, increasing blood circulation, massage muscles, relieve tension, excellent tool for plantar fasciitis Set including 3 levels of stimulation, soft for moderate massage, hard for strong level of stimulation, super hard for super deep tissue stimulation Handy size fit your pocket or bag carrying to home office or any other places