Robart 3/8" x 1" Stroke Cylinder This is 3/8" Bore Air Cylinder with Pinned Adjustable Attachment Bracket. FEATURES One Inch of Piston Travel Turned Bar Stock Aircraft Aluminum Parts No-Leak, Sealed Front End Shaft is Internally Threaded for Positive 2/56" Threaded Rod/Clevis Attachment. Cylinder that Delivers 11 Pounds of Force at 100 psi. INCLUDES One 3/8" Air Cylinder with Pinned Adjustable Attachment Bracket.