KACO push-to-go gel pen refill 100mm length suitable for K7/Chuxin series fountain pen 0.5mm black (Duraball tip) (5 pieces in OPP bag)

**Product Specifications:**

**Brand:** KACO

**Pen Tip Technology:** Double ballpoint pen tip for smooth writing experience, with a writing angle control as low as 48° to reduce friction between the pen tip and paper, providing a doubled smooth writing experience. The traditional single ballpoint pen tip typically has a writing angle of around 60°, while the KEFILL double ballpoint pen tip ensures smooth and fluent writing at 48°.

**DuraBall Writing Head:** Developed by KACO, the DuraBall writing head offers a broader writing view and comfortable writing experience. It is crafted using solid stainless steel rod cutting technology.

**Double Writing Length:** The pen provides approximately 800 meters of writing length (+/-10%), which is double the standard requirement, ensuring long-lasting writing companionship. The KEFILL pen core’s writing length is tested to be around 800 meters (+/-10%), meeting the national standard of double the required writing length.

**100 Pen Cores:** Each pen core has a length of 100mm and is suitable for KACO K7 neutral pens and K7 Panda Party neutral pens.

**Ink Leakage Detection Technology:** An additional process is added to reduce the risk of ink leakage, ensuring a secure writing experience.

**Classic Four Colors:** The pen offers red, blue, black, and blue-black ink colors to meet various writing needs. The ink colors are rich and vibrant, catering to a wide range of preferences.

**Packaging:** Available in packs of 100, 50, and 5 pens with double ballpoint pen tips.

**Product Name:** KEFILL 100 Neutral Pen Core with Double Ball DuraBall Writing Head

**Specifications:** 0.5mm, Black ink color

**Quantity:** 5 pens per pack

**Standards:** GB/T37853-2019, GB21027-2020

**Dimensions:** 100mm length, 5.7mm diameter

**Slogan:** Born for Excellence