お得な3本セット For those having trouble with the discontinued Mitsubishi UBR300 These are replacement refills compatible with the UBR300, which many people have been very happy with. Please give them a try. Other UBR300 products are here ↓ #UBR300_hananoosusume 【Product Name】 Mitsubishi UBR-300 Refill Replacement Ink (Compatible) Quantity: 3 Ink Color: Red / Red (Water-based) Character Size: F / Fine (0.5mm) Pen Tip: Rollerball Size: Length approx. 111mm Price: 1800 yen → 1500 yen ・Instant purchase OK ・No discounts ・Discounts available for increased quantity ・Black and blue ink changes and combinations are also possible Please feel free to ask any questions. Six years have passed since the original refills were discontinued in 2016, and ink degradation is unavoidable. Some customers have reported that even if they manage to obtain them, they can't use them (according to our buyers). Regarding the expiration date of the ink, We recommend searching the internet for "ballpoint pen refill expiration date". 【Compatible Refills】 In addition to Mitsubishi UBR-300, these refills are also compatible: ・Zebra A-300 ・Pentel BLF5 We haven't had any cases of incompatibility so far, but if the refills are not compatible or if you accidentally purchased the wrong ones, we accept returns, so please feel free to contact us. In that case, the buyer is responsible for the shipping cost (110 yen). 【About Shipping】 There are very rare cases where people do not understand standard mail shipping. We have described standard mail in our profile. Please be sure to read it before purchasing.