For rapid shipment of parts and accessories, our U.S. customers can reach us by phone at 302.427.4000, and then choose menu selection two (2). You can also email your orders to purchaseorders@tainstruments.com.. Our Customer Support Representatives are available during the hours of 8:00 a.m. to 4:30 p.m. EST, or by FAX at 302.427.4041 24 hours a day.