Inner bearing with lip seal 40mm Vetus ZWB40

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 40mm Bronze, GRP or Steel Stern Tubes, these units are environmentally friendly and virtually maintenance free.