There are 3 different size ink refills we offer to match the TiBolt family of pens.
The Schmidt easyFLOW900M is used in all of our Full Size TiBolts.
The G2 PILOT MINI refill which is used in the G2 sized TiBolt and
The LAMY M22 refill for all of the TiNyBolt users...
Please pay close attention when ordering to make sure you get the right refill for your pen.