SMC MGP Z Series. Compact Guide Cylinder, With Air cushion, MGPM63 250AZ T Wrench Set Dual Purpose 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 50 cylinder stroke 50mm Cylinder additional symbol No bellows Specification item model symbol Specification information With auto switch Without auto switch Mounting support type B Basic type (with bosses on both sides) tube inner diameter 25 tube inner diameter 25mm cylinder stroke 50 cylinder stroke 50mm Cylinder additional symbol Rubber cushion