SMC ZK2A Vacuum Unit, Single Unit Type Vacuum Generator, ZK2A12K5KWA 06 Bike Lock Specification item model symbol Specification Specification item model symbol Specification information With auto switch D With auto switch form pneumatic type Mounting support type B Front installation type tube inner diameter 40 tube inner diameter 40mm cylinder stroke 150 Cylinder stroke 150mm dual stroke mark No dual stroke mark cylinder stroke 2 Cylinder stroke 2 None cushion A air cushion Rod end screw shape rod end male thread rod end bracket no metal fittings auto switch Without auto switch Auto switch additional symbol 2 with or without Custom made specifications standard Specification item model symbol Specification information With auto switch Without auto switch installation support B Basic type tube inner diameter 50 tube inner diameter 50mm Types of port screws Rc cylinder stroke 150 Cylinder stroke 150mm Cylinder additional symbol No bellows