Autopen 24 is a reusable insulin cartridge delivery pen that has a side firing mechanism for easy injecting and handling. The dose of insulin is selected by means of a numbered dial with audible clicks. Its automatic insulin delivery means minimal force is required to deliver treatment, regardless of insulin volume, which makes it suitable for patients with low finger strength. The Autopen 24 is made in the UK by Owen Mumford Ltd. This example is complete with an illustrated box and leaflet.