1) 21 years in cassia business; 2) low pesticide residues; 3) low heavy metals 4) high quality 5) exported to EU and Japan The CASSIA trees are grown in an area with low heavy metals and low pesticide residues. So far, this product has been sold to Germany, France, USA, and Japan. The specification is as follows: appearance: in straight tube shape color: reddish brownlength: 7cm, 8cm, 10cm, 15cm, ...