Mk 3 Stern Tube Dimensions

[Rabbit]

I am about to attempt to fit a new stern gland assembly to my Mk 3.
To order one I need to Know the O.D. of the stern tube fibreglassed into the hull.
It has the offset type propeller shaft. Can anyone help with the dimensions. Thanks Rabbit.

[Rabbit]

For anyone with a Mk 3 side exit stern tube the dimension of my stern tube was 40mm O.D. x 53mm long. Rabbit