What is water key size for Conn 62h trombone?

What is water key cork size for Conn 62h?

That may be a pointless question. Sometimes when my horn goes into the shop (for a non-waterkey reason), it comes back with a fresh water key (lever and spring). The shop seems to treat it almost as a consumable, like corks in the cork barrel, or the rubber slide bumper. And it's not always the same shape. So if your 62h is more than a few years old, the water key might not follow factory specs anymore.