This is Genuine Intrepid point Refill for waterman ballpoint Pens, This refill is backed by crosspenmall quality assurance program. The refill is silky smooth. You have nothing to lose. Flawless and frictionless flow. High Quality Ink & Tips, Measures 4 7/16 in. x 1/4 in. (113mm x 6mm) These will fit Waterman Ballpoint Pens, Refills measure 4 7/16 inches long. These refills have a satisfaction guarantee backed by Crosspenmall, 30 day return policy. The trademarks of the pen manufacturer are identified only for the purpose of providing refill compatibility information. Those who have used our refills for ion and PhD can testify to our quality assurance program