Eden Sound Terra Stone Roller Bearing isolation

these are wonderful isolation. I used under my amps plus my 2nd turntable (which i am selling as i down size; also sold 2 amps as going from 4 way to 3way) If you have turntable or transport unit, highly recommend also platform i have available from Eden Sound. have 15 of these for sale, each $70. as new.  if use pp, ps add fees so i net .$55 each which is 1/2 of retail paid