Set includes: Natural Lava Stone Aromatherapy Bracelet with an adjustable length 6.6" to 8.7". Made of 8mm lava rock, natural picture stone and an elastic string. Designed as a diffuser bracelet for stress and anxiety relief, promoting a sense of calm and well-being. Simply add 1-3 drops of essential oils into the lava beads. Gently rub oil into beads for lasting aroma. 3 Pack of 100% Pure Essential Oils - Eucalyptus, Lavender and Tea Tree.