What size PVC to drive tapered neck bearing?

I'll get to replace my neck bearings this weekend, and would like to get a short piece of PVC at work today. I don't know the size of the neck stem...

Thanks

Can't recall Kent... I use one of the impact sockets out of my impact socket set to drive bearings... they go up to about 35mm (don't recall largest).

I did some searching and found the bearing sizes. Is the stem size about 30mm, 1-1/4" ? It was common to both bearings.
I found a few pieces of PVC around that size. I think I'm all set, thanks George

personally ive got a collection of very big intake and exhuast valves from one of the tractor mechanics who services my equipt they come in pretty handy to driving races and seals,if they get too beat up he just gives me more!plus you can hold on to the stem while your banging on it without smashing fingers!goodluck,happy wrenching!