Orion 5155 RockStable Anti-Vibration Pads for Telescope Mounts Simple and effective pads dampen tripod vibrations for more stable views through your telescope or mounted binoculars Specialized visco-elastic pad material neutralizes vibrations, leaving your tripod and attached optical instrument rock-solid and stable Place a RockStable pad under each tripod leg to keep your telescope from coming down with a case of the shakes Ideal for both visual astronomy and astrophotography pursuits Set of three Orion RockStable Pads - one for each tripod leg