Ostrich Heat-Erase Thermal Ink Cartridge Fountain Pen Refill Compatible with Parker, Hero, Deli, M&G 3.4mm Ink Cartridges Crystal Blue Erasable Ink Cartridge Box Set (10+2)

Cartridge Specifications

Color Options

• Crystal Blue
• Blue-Black
• Jet Black

Package Contents

• 10 ink cartridges
• 1 pen lubricator
• 1 heat-sensitive eraser
• Box packaging for easy access

Packaging Quantity

• 30 boxes per medium box
• 12 medium boxes per carton

Usage Instructions

• Easy and clean cartridge replacement by inserting the fine end into the pen body until a click is heard
• Recommended to use with the included pen lubricator for optimal ink flow and to prevent nib drying after periods of non-use
• Ink can be erased by friction-generated heat using the special eraser, allowing for on-the-spot correction and rewriting

Additional Notes

• The ink formula is upgraded for stable ink supply
• The erasing principle relies on heat generated by friction to remove ink without residue
• Suitable for repeated writing and erasing without damaging paper or hands