Fitness Mad Trigger Point Release Intensity Massage Ball Set Muscle Pain Relief Set of massage balls in 3 different hardnesses for acupressure massage and trigger point release. Starting with the softest (least aggressive) ball choose a ball of suitable hardness and position it on the point to be massaged. For the lower back or glutes start in a sitting  position; for calfs or thighs try either sitting or lying on the floor and gently roll around on the ball. For shoulders & upper back place the ball between your back and a wall. For the neck roll the ball around between your neck and open palm. Use in conjunction with a foam roller for great results Colour Grey - Hard   Green - Medium   Blue - Soft. Size 6cm diameter. Model FMASSBALSET