Swarnalekha® 100 Blue Ballpoint Pen Refills 10.7 cm. Length for Retractable Ballpoint Pens, 100 Pieces Blue Ink Refills (Pack of 100)

I have used 3 to 4 refills already, and put refills in 10-15 pensGood qualityInitial few strokes appear rough, later it smoothens out.Spring sits well, in most pens I have used.Best part is, no smudging at all, even till the end of the ink. This limitation was seen in many refills even when they were from branded companies. I was worried when using in good quality shirts for the fear of ink stains. This didn't smudge at all till the end of use..

It says it supports the click pen but the spring slides through the holding end so this product was a waste of money for me also there was no option of return available:(

I m using these refills as X-20 ISO style alternatives - those refills are impossible to acquire now without importing them at a steep cost or using a modified cross screw style refill.Anyways these are X-10 standard refills, the nibs are mediocre, the ink is standard high viscosity oil based ink just as I prefer,You'd benefit from changing the nibs from better refills that you have finished, I'm using the nibs from Pentonic BRT,Also some people complained that they had trouble fitting the springs, in my case the fins are standard and enough to fit the spring but if you're changing standards prepare to adjust the spring, you can increase the diameter by uncoiling and decrease the diameter by coiling more, will take some fidgeting and some time,

Great product. Used this for flair Ezeeclick pens. Saves having to throw away the pen after single use. Very cost effective. I haven’t had problem with the spring like it was mentioned in another review. May be manufacturers corrected this after the previous review.Would have been great if the refill was available in black also.

It does not contain 100 refills. It has just 50.

Ink is a bit more viscous due to which it's not smooth. Good for other works but not good for students who have to write a lot. It cause unnecessary strain on fingers and hand. Ball point is also not satisfactory. I have used only 1 refill but don't know what to do with the remaining 99 because I can't use these refils as they are not smooth enough to write fast.

Item riffile of ball pen totel dry ink in rifile and can not be used to write.

Good product