One set of 4 leveling/ isolation feet for your piece of machinery or equipment, sizes are 4 1/2" diameter at the widest, 2 1/2" thick with a 1/2" threaded stud from one side and a corresponding threaded inlet on the other side, which allows some flexibility for mounting, there are no identifying markings of any kind for manufacturer, weight capacity or date made. I have had these in dry indoor storage for many years so they haven't been taken directly out of service, although have been previously used, price is $50.00 for all 4 only, call/ text Doug