25 pieces per box 15-20 minutes burn time scent should last 2-4 hours after burn Place the incense on a heatproof, non-flammable holder - the lid of the incense tin works great. Always burn incense in a well-ventilated room, away from flammable materials. Never leave incense burning unattended or in reach of children, pets or a draft Albany Black Spruce This scent is meant to recreate early morning walks through the woods on the banks of the Hudson River. The damp earth and moss beneath your feet with the towering spruce flowering above. The earthy and spicy notes of black spruce stimulate and refresh, while Frankincense is a meditative oil and is known to promote vitality and strength. Vetiver is grounding and musky and invokes a sense of security.