Two very nice (no rust or even slight bend) front 51-52 mm long not including thread.....wire lead passes all the way through type.
One 39 mm long not including thread. Rear......lead comes out hole 26 mm from turn signal housing. Like the ones that came on my T500 originally.
To match this rear NOS turn signal assembly I bought on ebay awhile back.

I think these stems are of the hard chrome type so it's just not a matter of sending some stems I have to a regular chromer.