Backflow incense smoke flows down through a backflow burner and creates a mist in and around the product. This item must be placed on a heatproof surface. When backflow incense burns the mist it creates can leave a light residue on the burner and the surface the burner is placed on. This is from natural oils and resins within the incense and can be wiped clean with a damp cloth. Never leave burning incense unattended. Height 19cm Width 11.5cm Depth 10cm Cast in the finest resin Lovingly hand-painted Please note that after burning it is normal for a light oily residue to appear on the oil burner. Simply wipe away with a damp cloth. Please exercise caution when burning incense. They are so relaxing and lovely to look at. They are a lovely gift. Please Note you can only use backflow cones on the burner.