KACO SDry 0.5mm Quick-Dry Retractable Gel Pen Refills Black Bullet Tip Smooth Ink 10-Pack Asian Standard Compatible

Deep black for clear, sharp writing

Transparent barrel for easy ink level monitoring

Interchangeable pen tip protection cap that can be inserted into the refill tail to adjust overall refill length, enabling compatibility with most KACO and non-KACO pen models (extension tail only for 110mm refill)

Smooth dual-ball tip for consistent ink flow and writing stability

1. Remove the pen tip protection cap

2. Insert the KEFILL refill into the pen barrel

3. Adjust refill length by inserting the protection cap into the refill tail if needed (for non-KACO pens)

Single refill packaging

Box of 10 refills

Compatible with KACO pen series including PURE, ROCKET, POPUP, KEYBO, LINGYUE, and SHUYUAN series, as well as most other gel ink pens

Ink drying and writing length tested by Shanghai Wencai Laboratory

Paper used for drying test complies with GB/T12654 standard

Meets national standards GB/T37853-2019 and GB21027-2020

Exam use with smudge-free, fast-drying ink

Long writing sessions requiring high ink capacity

Users seeking smooth, stable, and clear writing experience