How much does a viscous coupling weigh?

Hi All,
Seeing as parts are cheaper in the UK, I was thinking of getting a new viscous coupling for my beloved P38's transfer gearbox on my next trip to the UK and bringing it back in my suitcase! I know they aren't a particularly large item but how much does it weigh? Also, what's the diameter and how big is the box likely to be. I'm sure someone has one knocking about that they could pop onto the kitchen scales whilst er indoors isn't looking - please.
Thanks

Can't tell you how much it weighs but it's not much.
It would easily go in either a suitcase or hand luggage.

Thanks for that : ) Anyone got a spare VCU knocking about and some scales?

Send an email to Ashcroft Transmissions in Luton. They will be able to tell you.