These are systemplast articulating levelers, Systemplast and valuguide are now one brand...these are original system plast i believe... i could not find exact interchange to the valu guide line.. but they might have one... i have included lots of pics to let you know dimensions.

Usable thread is 5"   5/8-11 thread, nut not included.   bolt pattern appears to be 2.250" and foot is under 4" wide (3-1/4") whereas the vg is 4"  so if your making something new it won't matter just enough for the job..

sold each