Right, that was a lingering thought floating in the back of my mind… that you might be after the cap size that is required to fit the coil.
The kit actually comes with a spare end cap that you can use to seal the wire after cutting coils off with a box cutter to make it shorter.
The wire after encasing with double-layer, glue lined adhesive, polyolefin food grade, heat shrink tube is 7.55 mm thick. The spare PVC end cap included with the kit has an I.D. of 6.5 mm
Here is the video link to removing coils with the box cutter which is extremely easy to do…
If you have any further questions… gust let me know!