Ancestral Voices incense plank; Australian Oak, Lavender and Frankincense No Glues, no essential oils, no toxic materials. 100% plant material. 30 minutes burn-time. Just break a piece and burn in a fireproof container. Ingredients are sustainably and ecologically harvested. We employ the traditional way of producing incenses by hand which focus on bringing forth the plant intelligence. The plank will burn like an incense cone but contains no glues, no artificial binders, no essential oils and no artificial fragrances. Plank burn-time is about 20-40 minutes. Just break a piece off and burn in any fireproof dish.