Smc cq2b25 10s single action pneumatic compact cylinder 25mm bore 10mm stroke smc cq2b25 10s this single action compact pneumatic cylinder is a total redesign of the popular b cq2 b series the body features an auto switch mounting channel that gives total protection against potential accidental damage plus improved health and safety benefits during installation and maintenance smc cq2b25 10s single action pneumatic compact cylinder 25mm bore 10mm stroke