My hubby bought this text liner because he really likes reading while lining the text. He also needed one when he was invited to a seminar. My hubby really loves green, so he bought the green one. The text liner is of Staedtler brand and why he chose Staedtler? Staedtler is a popular Germany brand that specializes in office tools and accessories/stationery, and it’s proven to have the best product quality. There is a bar code located at the back of this text liner, and just below the bar code there are features of the text liner, it says, ‘paper + copy + fax + inkjet’. The ink is refillable and inkjet safe. But so far, we haven’t had to refill it because we haven’t run out the ink yet. The cap is a twist cap, so we won’t have to be afraid of putting it in a wrong way. A good thing is that it doesn’t smell like other cheaper one (I once also bought a cheaper text liner when in college, and I just couldn’t stand the smell so I quitted using it). The grip is also comfortable and the tip is designed perfectly for text lining. Overall, it’s a very reliable product!