Keep your favorite retractable fountain pen flowing flawlessly with the Writech Clicktek Retractable Fountain Pen Refill Set. Specifically engineered for Writech’s innovative Clicktek and retractable capless fountain pen series (including the W-784 and W-784M models), this set includes 5 replacement cartridges filled with rich, vibrant black ink.

Designed for eco-friendly sustainability and convenient long-term use, these proprietary cartridges eliminate the risk of early ink drying while delivering an incredibly smooth, skipped-line-free writing experience. The user-friendly design ensures clean, mess-free replacement in just seconds.

• Brand: Writech
• Product Line: Clicktek / Retractable Fountain Pen Refill Set
• Model/Refill Number: W-1784 (Pack Part: W-784/5BLACK)
• Ink Color: Black
• Ink Type: Water-based fountain pen ink
• Refill Type: Proprietary Ink Cartridge
• Quantity: 5 pieces per pack
• Compatibility: Exclusively designed for Writech W-784 and Clictek Retractable Fountain Pens (Note: These are proprietary cartridges and are not international standard size).
• Product Dimensions: Length: 4.0 cm x Diameter (Widest section): 0.8 cm x Opening/Collar Diameter: 0.34 cm (Individual Cartridge)
• Package Dimensions: L 5cm x W 1cm x H 4.5cm  (5pcs Tuck Box)

Easy Cartridge Replacement Guide

1. Prepare: Click the top mechanism to retract the pen nib completely, then unscrew the pen barrel.

2. Remove: Pull out the depleted or empty ink cartridge from the internal housing.

3. Install: Insert the new black cartridge with the nib side facing upward into the internal frame until you hear or feel it firmly click into place. Reassemble the pen barrel.

4. Prime: Once reassembled, gently flick the barrel a few times to speed up the ink flow. Click the top to extend the nib and keep the pen pointing downward for roughly 3 minutes to guarantee a consistent, smooth ink flow before you begin writing.

SSP-10100234