KACO Stationery 0.38mm Black Retractable Pen Refill, Gel Pen Refill with Dual Beads, Quick-Drying ST Tip for Exam Practice, Large Capacity Refill, Compatible with Standard And Universal Pens, Pack of 10

Red, Blue, and Blue-black inks are non-quick-dry

Transparent refill tube for easy ink level monitoring

Large ink capacity for longer writing duration

Suitable for various KACO pen models including PURE, ROCKET, POPUP, KEYBO, TWIST, K7, K10, FIRST, SMOOTH, and others

Innovative design with removable pen tip protector cap that can be inserted into the refill tail to extend refill length for compatibility with non-KACO pens (only for 110mm refills)

Single refill packaging available in sets of 1 or 10 pieces per box

Multiple packaging options including NEFILL, KEFILL, SDRY series with various tip types and colors

Complies with GB/T37853-2019 and GB21027-2020 national standards for gel ink refills

Dual-core refill system combining KEFILL and SDRY series for reliable performance in important exams and daily writing

Carbon tungsten dual ball tip ensures smooth and durable writing

Classic four-color ink set meets most writing needs

1. Remove pen tip protector cap

2. Insert cap into the tail end of 110mm refill tube

3. Adjust refill length to fit non-KACO pens

YOUR WRITE CHOICE - KACO Gel Ink Refills deliver rich ink color, smooth writing, quick drying, and durable tips for professional and everyday use.