Footing size for a Beman ICS White out?

[J. Cook]

Do any of you know the correct footing size for the Beman ICS 340 White out shaft?  I'm thinking 2117?  This is for a friend that's not local to me so I'm trying to help him out, but don't have these shafts in my hands to just try different sizes.

Thanks!

[oldbohntr]

2216. Is what I use, epoxied and knurled.

[iohkus]

If they are sub-categoried "Bowhunters", then yes, 2117's.