- 1 : Central insulation joint in bakelite covered linen 3T (norm DIN HGW2083). Laminated with 2 sealing gaskets in Klinger-Sil.
- 2 : Isolating tube in bakelite covered paper norm DIN HP2065
- 3 : Isolating washers bakelite covered linen
- 4 : Zinc coated bolting cl. 8.8 or A4 bolting (A2 on request)