This 2 pack of non-OEM Ink Cartridge replaces FP PIC10 58.0052.3038.00. This cartridge is fully compatible with FP PostBase insight, i2, i3, 20, 30, 40, 65 and 85, Classic auto and semi-auto, Pro, and Pro DS postage machines and provides up to 4,000 impressions in USPS approved Fluorescent Red ink. NOT compatible with Postbase Mini or MyMail or Vision. Do NOT purchase if you have a PostBase Mini or MyMail or Vision.