Top writing quality Black ink refill has smooth writing, waterproof, fast drying performance. The ink dries quickly to prevent smudges, making the paper look elegant and tidy. Gives you a Unbeatable writing experience. Universal compatibility The replacement ballpoint pen refill is compatible with many ballpoint pens, help extend the life of your favorite expensive pen. Long life & Durable The life of the refill is quite long. Refill pen body made of metal stainless steel, and there is a lot of ink in the refill, the filling tip is sealed with a protective wax, which means that the extra refill you store will not dry out while waiting for use. Multipurpose These refills are suitable for work, school, hotel, restaurant and various writing occasions; Nice refills for office supply, school stationery, family use. lightweight and portable, easy to carry. Specification: Ink Color: Black length: 3.9 inches Tip: 1.0mm Material: Stainless steel Package: 15 refills in a self-sealing plastic box. Warm Tips: 1.The refill is initially for B2 B3 ballpoint pens in our company. Search these ASIN for more details: B07TJWG1H5, B07THYVK24 or B07TK1J7BD. Also, you can just input""on amazon search box. 2.The refill is applicable to generic tactical pen and ballpoint pens of other brand like Parker. But you must carefully check the specification of the refill to see if they can match your original pen properly. 3.You can remove the spring from the narrow part of the refill, just with a little bit force. When its service life comes to an end, the spring can be reserved as a backup gadget, if necessary. Sincere After Sales Service: If you have any question or advice about our products,please feel free to contact us. ★PROFESSIONAL WRITING TOOL ––– 【We have pencil cases for sale in our shop, welcome to buy it 】Fit Parker Compatible Ballpoint pens and Waterman Compatible Ballpoint Pen Refills Gel ink for super smooth writing experience, rich ink flow,consistent lines, and fairly quick drying. The pen tip writes a powerful bold black stroke effortlessly and consistently. ★SMOOTH WRITING ––– The ballrolls smoothly over the paper, letting the ink glide on and offers great line sensitivity,Makes writing smooth and clear. Great for practicing your handwriting, calligraphy, or kanji or whatever.Not only does it write nice, but it looks and feels nice ★GOOD QUALITY ––– The pen refills is made of metal material, light and smooth, durable and durable, and the slim body makes the pen easy to carry.Feeling substantial and premium when writing. Long writing life time ★MULTIPURPOSE ––– These refills are suitable for school, work, office, restaurant and various writing occasions; Nice refills for office supply, school stationery, family use. It's the original cartridge of B2 ballpoint pens, Also applicable to most other brand standard size ballpoint pens ★PERFECT PACKAGE ––– 15 refills of one pack in a tailor-made box,a large amount of pen refills are enough for your use, Refill tip is sealed with protective wax to keep the ink from drying out.This is a good choice when your expensive pen runs out of ink