Prusa - belts

Hi everybody,
I'm building my first RepRap - Prusa, and I'm not sure which belts are pulleys designet for. I have found company which sells belts, but they have types T5 and AT5. The AT5 belt has a bit longer teeth with shorter round shaped spaces in oposite to T5 profile, which has aproximately 1:1 ratio tooth:space and teeth are more rectangular (both belts have the right 5 mm pitch).
When I take a closeup look at the pulley, it seems to me, that teeth on it respond more to AT5 profile, but I'm not sure.

2nd question: They sell standard width of belt 6 mm (in Prusa BOMs is usually written 5mm width). Is 6 mm width problem if the space between bearing washers (the large ones) is 9 mm on my machine in build?

Thanks for help in advance

Jakub

The belts should be T5. The printed pulleys come out more rounded than machined ones but they work fine.

6mm wide is no problem on a Prusa, probably better than 5mm as they run on 7mm wide bearings. Mendel uses smaller bearings so needs 5mm belts unless you add an extra washer.

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[www.hydraraptor.blogspot.com]

Thx
Jakub