Inquiry (采购产品): 438 and 438 difference what is the difference between these 2 units? Call me at (610) 533-7791 **** Hidden Message ***** Ron Riddle Bethlehem, PA 18001 USA Company: FFE Minerals Phone: (610) 533-7791 E-mail: ronald.riddle@ffeminerals.com **** Hidden Message ***** ronald.riddle@ffeminerals.com
