Customer Service: 

Jack Cheng or Mark Feng

4923 Kenton Lake

San Antonio, TX 78240-5404

xchengswri@gmail.com

xchengswri@dynamicentropy.com

dynamicentropyllc@gmail.com

T: 216-269-6757 or 210-248-4440

F: 210-561-4303

Laboratory address: 002 Granburg Rd, Lyte, Texas, 78052