Backflow incense (flow smoke incense cone incense) fragrant powder, sticky powder About 50 tablets/box about 20 minutes Length 18.8cm * width 6.2cm * height 3cm height 3.5cm, bottom diameter 1.2cm tea room. home. office After lighting the smoke tower incense. Because smoke is denser than air. it cascades down from above. Form a marvelous landscape of backward flow.