Features:- Basalt rock is originally found deep within a volcano from nature.- 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.- Setting for a 50 minutes full body massage,enwrap the stones with natural essential oil, make you comfortable.Description:Material: BasaltNatural Bamboo Box: 290 x 200 x 75mmColor: BlackProduct Weight: 5114gPackage included:1 x Natural Bamboo Box2 x Overlarge Circular Facial Basalt ( 1 for sacral, 1 for the stomach ) Size: 110 x 70 x 30mm6 x Large Circular Facial Basalt ( 6 for backside ) Size: 75 x 55 x 25mm14 x Medium Circular Facial Basalt ( 8 for leg, 2 for plam,4 for arm) Size: 65 x 45 x 20mm6 x Small Circular Facial Basalt ( 2 for forehead, 2 for head crown, 2 for hindbrain ) Size: 40 x 30 x 20mm6 x Small Ellipse Hot Stone ( For heating bed )8 x Toe stones, bagged separately, paired for size and balance. Size: 40 x 30 x 8mm6 x Small Circular Facial Basalt ( facial cosmetology ) Size: 25x8mm1 x Small Ovular White Marble ( for forehead and coll therapy ) Size: 40 x 30 x 8mmNotes:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight deviation for the measurement data.