Jetworks FCV ball size?

[Quinc]

I tried to order a couple from JW but they never got back to me, so going to order them on mcmaster. Anyone know what size they are?
https://www.mcmaster.com/balls

*adjustable fcv unscrewed itself while riding and lost mine out the scupper..

 

[Big Kahuna]

order a 1/4 and a 3/8 one of those should work

 

[iQRTurbo]

3/8 (.375)