Having re-terminated my K400, I'd like to keep oxidation at bay. Any recommendations for suitable heat shrink tubing?

There are no recommendations from certain manufacturers, but I order from this shop, which offers all the shrink tubing that is relevant to me.

https://www.dienadel.de/search?query=schrumpfschlauch

https://www.dienadel.de/search?query=kabelhosen

Thanks Hermann