This 28 piece basalt stone set is Ideal for estheticians and reflexologies. Applying the 28 basic massage stone set for a 45 minutes full body massage, enwrap the stones with natural essential oil, it will maximize your treatments and make your clients feel extremely comfortable. Basalt rock is originally found deep within a volcano where it remains for hundreds of millions of years, gaining all of its natural properties. All Basalt is rich with iron and magnesium, which make this stone very effective in massage treatments. Basalt is excellent for holding heat for long periods of time and has very low radiation which makes this rock a much more healthy and beneficial stone for use. • 8 Large flat ovular basalt size 3''* 2.3''*1'' (4 for backside, 4 for the thigh)• 12 medium flat ovular basalt size 2.6''*1.9''*0.7''(4 for arm, 2 palm rest, 2 foot, 4 for calf)• 4 Small flat ovular basalt 1.5" x 1.2"x 0.7" (2 for forehead, 2 for the crown of the head)• 4 Miniature pressure point basalt 3" X 1.2" X 0.7" (for backside and neck)• 100% Natural Black Basalt, No Wax, No dyestuff, No Chemicals, No Radiation. Packed with a Natural Bamboo Box