Flexible inner bearing with DUAL lip seal for double security against leaks. Front seal chamber is packed with silicon grease, whilst raw water from either a dedicated water scoop or a branch supply from the engine exhaust cooling circuit. (Ideally from the supply pipe up to an AIRVENT anti-syphon device.)
Designed specifically for Vetus 30mm Bronze, GRP or Steel Stern Tubes, these units are environmentally friendly and virtually maintenance free.
