PILOT FRIXION Ball SWITCH 4 Multi Pen & Refill (0.38 / 0.5 / 0.7mm)

Keeping notes pristine while managing daily schedules has never been so seamless for busy minds. This advanced frixion ball switch offers an intuitive slide mechanism that merges erasable convenience with permanent security in one sleek barrel✒️. Draft out tentative project timelines, correct scheduling slips on the fly, and click over to permanent ink for signing official documents with a simple glide switch⚡. Effortless multitasking is now literally at your fingertips for structured notebook logging and everyday plotting🎯. At the core of this innovative instrument is the dual-ink layout that caters to every writing task. On one side, three colors of premium thermo sensitive ink glide onto standard paper, disappearing completely with friction-generated heat without leaving messy eraser crumbs behind🧹. On the other side, a robust and permanent oil based ballpoint ink provides rich, dark lines that resist water, light, and alcohol smudgeproof🛡️. Transitioning between temporary sketching and permanent archival writing becomes a satisfying tactile experience that keeps your workflow organized💫. Designed with a comfortable rubber grip and a balanced resin chassis🎨, this erasable multi pen offers superb control during lengthy brainstorming sessions or busy commutes. The sophisticated spiral cap design beautifully symbolizes the unique duality of having temporary ideas and permanent records coexisting peacefully within a single pocket👔. Swapping out empty cartridges is completely straightforward, allowing you to easily insert fresh refills to keep your creative momentum going strong🔥. Features Experience ultimate writing versatility⚡ by combining three erasable gel colors with one permanent black ballpoint in a single high-performance chassis⚙️, perfect for switching between drafting and signing papers instantly📝. Rub away mistakes🧹 easily with the built-in rubber tip that generates heat to make erasable ink disappear cleanly🧼 without tearing paper or leaving messy eraser crumbs behind🗑️. Navigate between ink types fluidly🔄 using the side slide levers for erasable colors🌈 and a clip-slide action for the permanent ballpoint, boosting task efficiency📈. The permanent black ink features a highly durable pigment formula🧪 that resists water, light, alcohol, and rubbing🔒, ensuring official records stay safe⚓. Enjoy fatigue-free writing with an ergonomic rubberized grip🤲, housed in an elegant body featuring a modern spiral cap design🎨 popular among stationery enthusiasts globally🌍. Specifications Brand: PILOT Country of Brand Origin: Japan Model: Frixion Ball Switch (LB31FBS-1 / LB31FBS-2) Available Barrel Colors: 0.38mm: Black, White Gray, Mocha, Blue Gray, Lavender 0.5mm: Black, White Gray, Olive Green, Navy, Bordeaux Ink Type: Thermo-sensitive Gel Ink (Frixion) + Oil-based Pigment Ink (Permanent) Ink Colors: Frixion: Black, Red, Blue, Green | Oil-based: Black Pen Nib Sizes: 0.38mm: Frixion 0.38mm + Oil-based 0.5mm 0.5mm: Frixion 0.5mm + Oil-based 0.7mm Refill Models: Frixion: LFBTRF-30UF (0.38mm) / LFBTRF-30EF (0.5mm) Oil-based: BRF-15-B (0.5mm) / BRF-17-B (0.7mm) Material: Resin body with rubberized grip Size: L 145 x W 13.8 x H 13.8 mm (5.71 inch x 0.54 inch x 0.54 inch) Weight: 15.2g (0.54oz) Q&A How does the temperature-sensitive erasable ink work? The specialized gel ink reacts to temperature changes. Rubbing the paper with the built-in rubber tip generates friction heat exceeding 60°C (140°F), causing the ink to become completely transparent. If the document is exposed to extreme cold, such as temperatures below -10°C (14°F), the hidden writing will magically reappear. Can the permanent black ink be erased with the built-in rubber tip? No, the permanent black ink is a highly durable oil-based pigment formula that cannot be erased. It is specifically formulated to resist friction heat, water, alcohol, and fading. This ensures your legal signatures and official records remain secure, even if you accidentally rub over them with the rubber tip. Are the replacement refills cross-compatible between different nib sizes? Yes, the multi-pen body is fully compatible with various replacement refills. You can easily swap a fine 0.38mm gel refill with an extra-fine 0.5mm gel refill, or change the permanent ballpoint from a 0.5mm tip to a 0.7mm tip, allowing you to customize your writing experience to suit your exact planning or drafting needs.