1、 Compact, attractive appearance. 2、 Y ring seal, reliable, long life. 3、 Guided by oil bearings resistance to wear, smooth movement. 4、 Smooth shape, easy cleanuping. 5、 Needle valve and inlet port are made at one side, easy mounting. 6、 Non-tie-rod design. The end covers are assembled tightly with barrel, increasing rigidity. 7、 Mounting dimensions is in common with 10A-5 series cylinders.