Hollow plunger design allows for both pull and push forces Composite bearings increase cylinder life and side load resistance Hard coat finish on all surfaces resists damage and extends cylinder life Handles included on all models Floating center tube increases seal life Steel baseplate and saddle for protection against load-induced damage Integral stop ring prevents plunger over-travel and is capable of withstanding the full cylinder capacity High-strength return spring for rapid cylinder retraction CR-400 coupler and dustcap included on all models All cylinders meet ASME B-30.1 standards