1. Grab 11 specifications with diameters from 8 to 85 mm 2. Movement direction: bellows upward or downward 3. Different bellows materials: EPDM or silicone 4. Side air connection including middle hole, or from the center above 5. Optimize process flow and improve quality: avoid scratches on workpieces 6. Additional security: can be sensed by proximity sensor or sensor 7. Used to gently grab precision workpieces from inside