A retractable fountain pen that can be used anytime, anywhere just by clicking, and addresses the challenges of cap-type fountain pens. "Curidas" is named after the mechanism of retracting out the pen tip and the coined word of his CURIOSITY. Even though it's retractable, the ink will not dry without a cap. The airtight space of the pen tip storage part is made small to suppress the evaporation of water in the ink. The pen tip comes out long and you can see the writing part well. Size : Overall length 6.02 in, maximum diameter 5.43 in, standard weight 0.84 oz (for both converter and cartridge) Material : Stainless steel, resin, chrome plating.Pen tip : Stainless pen (ST-2). Complimentary converter and cartridge included. Compatible with converters (Converter 700, 500) (Sold separately). Refill Cartridge: SPSQ-400, SPN-100A (Sold separately). Kanji Love Sticker included. Platinum Fountain Pen Curidas Retractable Fountain Pen Urban Green Fine Point Knock Type Fountain Pen PKN-7000#43-F With Kanji LOVE Sticker A retractable fountain pen that can be used anytime, anywhere just by clicking, and addresses the challenges of cap-type fountain pens. "Curidas" is named after the mechanism of retracting out the pen tip and the coined word of his CURIOSITY. Even though it's retractable, the ink will not dry without a cap. The airtight space of the pen tip storage part is made small to suppress the evaporation of water in the ink. The pen tip comes out long and you can see the writing part well. Size : Overall length 6.02 in, maximum diameter 5.43 in, standard weight 0.84 oz (for both converter and cartridge) Material : Stainless steel, resin, chrome plating Pen tip : Stainless pen (ST-2) Complimentary ink cartridge included. Compatible with converters (Converter 700, 500) (Sold separately) Refill Cartridge: SPSQ-400, SPN-100A (Sold separately) Kanji Love Sticker included.