Heat exchanger tube stack o-ring and rubber seal for Vetus Diesel M3.10 & M4.14.
Older (one piece) heat exchangers use 1x o-ring STM1005 (open end) and 1x rubber seal STM1060 (injection bend end).
Newer heat exchangers (separate exhaust injection bend) use 2x o-ring STM1005.
Part references:
STM1005 - o-ring
STM1060 - rubber seal
