Stainless Steel Vacuum-Compatible Linear Stage 7T67SSV-25 have a large mounting surface, great travel range for this relatively small size, low profile and increased stability of precision. Box designed reinforces the stage, reducing flex. Stainless Steel, as a material, adds to stability. You Can mount a second driving screw on the other end (to lock the platform in fixed positioning applications). The platform is preloaded by springs. The stage can be stacked immediately to other units or to their own type (e.g. in X-Y configuration). The stage could be used upside-down. For immediate attachment the base has 2 clearance holes for M6 screws. Similarly, the platform has clearance holes for M4 screws. Slip the screws from top or under through the across holes in a platform/base. Micrometers 9S75M-25 comes as standard.