I use IsoAcoustics Orea pucks. A nice clean surface s required on both sides but they have suction cups on top and bottom and do a nice job of holding things in place. It is also better to isolate your speaker from the stand than isolating the stand from the floor.
They have a less expensive pro audio puck that is in black that is virtually identical in terms of performance but doesn't have the polished metal look.
They have a less expensive pro audio puck that is in black that is virtually identical in terms of performance but doesn't have the polished metal look.