PREMIUM COMPATIBLES INC. PCI SOURCE TECHNOLOGIES STI-204501 3.25K YLD STI ST 9216 FOR LEXMARK E321 E323 PPCI SOURCE TECHNOLOGIES STI-204501 3.25K YLD STI ST 9216 FOR LEXMARK E321 E323 PRINTERS MAGNETIC INK CHARACTER RECOGNITION TONER FOR CHECKS AVG YIELD 3250 PGS. Manufacturer : PREMIUM COMPATIBLES INC. UPC : 845161021514