... invoice or contract for customers.E.Customers send high resolution picture (at least 300DPI),better in AI ,CDR format,JPG and ... .Payment: start production upon receiving bank receipt. G.Delivery.Slim LED Crystal Light Box Advantage : Light weight ,Thin ,Low Power ... and past ,size and shape can be Customized Freely . Slim LED Crystal Light Box Application : 1). Exhibition place2). Company logo3). ...