Compatible direct replacement for FP PostBase PIC10, OEM part # 58.0052. 3038.00 ^^ Compatible with PostBase Auto, PostBase Pro, PostBase 20, PostBase 30, PostBase 45, PostBase 65, PostBase 85, PostBase Insight ^^ Yields up to 4, 000 Impressions ^^ Accurate, clean & readable print quality ^^ Pack of two cartridges - fluorescent red ^^ USPS Approved Ink ^^ Made in the USA