Now located in Liverpool, the history of Diamine dates back to 1864 when the company was founded by T Webster and Co. in London. The business moved to Liverpool in 1925 and T Webster and Co. changed its name to Diamine in 1964. However, changes of company ownership had all but killed the brand until its recent resurrection.
These cartridges are standard-size (38mm long) in packs of 6.
See this page for pens that are compatible. Please note that these cartridges will not fit Parker pens.