Do you want create your own silicone sock for the Ring Heater V1? Then download the files, print them; get 5 M3 threaded inserts and 5 M3x30 screws; use a heat resistant silicone and use a syringe to inject the silicone into the mould. To get optimal results use a vacuum chamber.
BOM
5x M3 threaded inserts
5x M3x30 (recommendation ISO 7380-2)
The Ring Heater V1 has a outside diameter of 18 mm.
The author hasn't provided the model origin yet.