Pilot LFBTRF30EF Frixion Ball Refill 0.5mm Black, Pack of 10 ¥2,380 Product Description Get a great deal with this bulk purchase of popular Frixion refills! Pack of 10 Pilot LFBTRF30EF Frixion Ball Refill 0.5mm Black, Pack of 10 These are 0.5mm refills for Frixion multi-color ballpoint pens and Frixion Ball Slim 05. They are not compatible with the Frixion 2-color retractable ballpoint pen. These are refills for the Frixion Ball pen, which allows you to erase what you've written. After the ink dries, rub the back of the pen with the rubber eraser to make the color disappear! The color disappears due to friction heat, so there are no eraser shavings, and you can rewrite in the same spot as many times as you like. *Cannot be used for official documents or addressing envelopes. Compatible pen body model numbers are LFBS-18UF, LKFB-60EF, LKFB-80EF, LKFB-150EF, LKFB-2SEF, and LKFB-3SEF.