Shoyeido's Zen Incense is an ideal companion for meditation, quiet reflection, or simply to scent a large room. Each 13-inch stick is three times thicker than our other stick incense, with a two-hour burning time. Many customers use them as time-keeping tools for meditation, or even for outdoor gatherings. No wooden cores means you'll enjoy three subtle, natural, extruded fragrances -- without needless filler.