This Agilent Varian OEM vibration kit for the TriScroll 300 and 600 vacuum pumps significantly reduces transmitted vibration to the surface on which the pump sits. Typical vibration reduction level is 75 percent for TriScroll 600 and 86 percent for TriScroll 300. Although the rubber mounts are non-skidding, if required, you can additionally secure the pump onto the surface using the two mount flange holes. This requires additional screws, not included. This kit includes a 4 mount set with allen head screws and washers.