info@sierrabios.com 

 sales@sierrabios.com

+66 2345 9143 

+66 9898 79882, +66 6232 12214

Sierra Bioscience Co., Ltd. 49/15 Mantana Chaeng Wattana Village Moo 3, BANMAI sub-district, Pak Kret district,    Nonthaburi 11120 Thailand