SMC ZK2A Vacuum Unit, Single Unit Type Vacuum Generator, ZK2A07K5KWA 08 Stroke_201^320mm Specification item model symbol Specification Specification item model symbol Specification information With auto switch D With auto switch installation support B Basic type tube inner diameter 63 Bore size 63mm Types of port screws Rc cylinder stroke 400 Cylinder stroke 400mm Cylinder additional symbol No bellows Specification item model symbol Specification information tube inner diameter 25 tube inner diameter 25mm Types of port screws Rc Magnet holding power type H Holding force H type cylinder stroke 250 Cylinder stroke 250mm reconciliation format B With shock absorber (with 2 pieces) auto switch Without auto switch Auto switch additional symbol 2 with or without Custom made specifications standard