Material of stone : Calcium Carbonate
Comes Complete with 6 Large(2.75″x0.71″) & 6 Small(1.8″x0.71″) Hot Stones
Lightweight (4.4 pounds w/stones) and Portable, Plus No Water Needed
Dual Heating Elements Heats Stones to 122° F in about 10 minutes, while outer case remains cool
A great addition for your practice at an affordable price!