Triple 4 original equipment water pump / power steering pump housing to engine block o-ring seal to fit all Defender TD5 models.
This o-ring seals the coolant outlet from the engine block to the water pump housing.
This is a premium original equipment quality part. The o-ring has the correct grooved profile on both the inner and outer seal faces, unlike the cheap versions that are just a plain o-ring.
Related part number ERR6711