Which stud for magic arm?

[Jeffrsx231]

Ok, so I'm going to order this friction magic arm:

http://www.bhphotovideo.com/bnh/controller/home?O=cart&A=details&Q=&sku=215857&is=REG

And I need to get a super clamp with it, but I'm unsure of the size stud I need.
It's a little confusing, they state sizes from 1/4", 3/8" I'm not sure what I need.

My question is, will this stud fit, becuase it's what I have now that I ordered with my previous super clamp, its the "standard stud"

Stud:

http://www.bhphotovideo.com/bnh/controller/home?O=product.jsp&A=kitInfo&Q=&sku=5159&is=REG

Thanks

 

[Big Mike]

If that is what fit your previous clamp, I'd think that it will fit the new one as well.