The pack consists of:
ITF Ink Treatment formula that:
Monteverde Mixed pack fountain pen ink cartridges Box of 12. Monteverde Mix Pack fountain pen ink cartridges are European standard international size, and will fit most fountain pens that accept international cartridges. The Cartridges DO NOT fit Lamy, Shaeffer (except the VFM), Platinum, Parker, Cross, Pilot, Sailor and many others that use proprietary cartridges.