Variety Pack includes 4 pcs #4 #5 #7 #8   all Furick designed.

These are the sizes recommend for AC welding.

AC welding is best to use the smallest cup to get the job done, the smaller the cups keep the Heat unput to the material to a minimum, this allows the welder to have better control against holes opening up and the heat getting out of control.

#4 and #5 will mount on Collet bodies for the 9/20 torches and stubby collet bodies for the #17 torch.

#7 and #8 will mount on the Gas lenses for 9/20 and Stubby gas lenses for the #17 torches.