After 3-4 years, the fire rope door seal on your stove will start to wear out, and will need replacing.
The Windy Smithy door seal kit comes with seal and with high temperature glue to keep your stove running efficiently for another few years.
Measuring your stove
Please state the diagonal measurement of the door hole in the burner (see picture):
Small (Wendy) 195mm
Medium (Louis, Louis Ranger and older Henry, Henry Ranger and Arthur) 235mm
Large (newer Henry, Henry Ranger and Arthur) 274mm