Postbase PIC 40 High Capacity Ink Cartridge Compatible Direct Replacement High Capacity Ink Cartridge Set for PostBase Mailing System Provides up to 18,000 impressions, depending on applications, and usage Compatible with all PostBase Models, 20, 30, 45 & 65 Mailing Machines. OEM part # 58.0052.3028.00 Pic40 is NOT compatible with MyMail or Mini