UNI Mitsubishi SA-7CN Laknock Retractable Ballpoint Pen Refill (0.7mm) - black

【Product Name】 UNI SA-7CN Retractable Ballpoint Pen Refill

【Model No. 】 SA-7CN

【Product Code】 SA7CN.24 (Black), SA7CN.15 (Red), SA7CN.33 (Blue)

【Brand】 UNI (Mitsubishi Pencil Co., Ltd.)

【Unit】 Each

【Product Specifications】

The SA-7CN is the standard refill for the Mitsubishi Laknock series retractable ballpoint pens. The tip is made of stainless steel with a 0.7mm tungsten carbide ball, delivering smooth, consistent ink flow and clean, precise lines without scratching paper. The refill uses high-quality oil-based ink that delivers vibrant colours and a smooth, skip‑free writing experience. With its refillable design, you can extend the life of your pen body by simply replacing the refill — an economical and environmentally friendly choice.

- Type: Retractable ballpoint pen refill

- Tip Size: 0.7 mm (Tungsten Carbide Ball / Stainless Steel Tip)

- Line Width: Approx. 0.5 – 0.7 mm (Medium)

- Ink Type: Oil-based dye ink

- Ink Colours: Black, Blue, Red (3 colours available)

- Refill Dimensions: Diameter 3.0 mm × Overall Length 121.0 mm

- Refill Weight: Approx. 1.0 g

- Tip Material: Stainless steel

- Key Features:

  - Tungsten carbide ball tip for smooth, uniform ink flow

  - Oil-based dye ink delivers vibrant, fade‑resistant colours

  - Easy to replace, extending pen life

  - Perfectly compatible with Mitsubishi retractable ballpoint pens

- Writing Length: Approx. 1500 – 2000 metres (approx. 4–5 times longer than standard domestic gel pen refills)

- Shelf Life: Approx. 4 years when properly stored

- Packaging Options: Single pack, Box of 10 refills, Box of 12 refills, Carton of 100 refills, etc.

- Country of Origin: Japan