Here is a list of the MM gripper specs. I thought this would be helpful for anyone interested and anyone looking to get replicas from Tetting.
MM1
Tetting Elite .295" Spring
1/4" Mounting Depth
2.75" Spread
MM2
Tetting Elite .295" Spring
3/16" Mounting Depth
2.75" Spread
MM3
Tetting Super Elite .306" Spring
1/4" Mounting Depth
2.75" Spread
MM4
Tetting Super Elite .306" Spring
3/16" Mounting Depth
2.75" Spread
MM