Norton Assa Abloy 7500M 689 Door Closer 7500 Series Features: Tri-Style packaging; tri-packed for regular, top jamb or parallel arm mounting Non-handed Rack-and-pinion design Cast aluminum body Adjustable spring sizes 1-6 2-3/16 (56mm) projection 1-1/2 (38mm) diameter piston 5/8 (16mm) diameter pinion journals Staked valves Corrosion resistant model (non-hold open only). Specify 7500M Metal cover. Specify M suffix Lead lined metal cover. Specify MLL suffix Retrofit plates NorGlide fluid Molded plastic cover All standard arm applications allow doors to swing 180, conditions permitting Self-drilling screws Full-size template Application specific mounting: Regular (S), Top Jamb (JS) or Parallel (P) mount Heavy-duty arms: Regular Rigid, Parallel Rigid, CloserPlus, CloserPlus Spring and Unitrol Slide Tracks: push or pull side mounting Exceeds 25 million cycles (witnessed and verified by UL) 25-year limited warranty Functions Standard, separate and independent, latch, sweep and backcheck intensity valves Backcheck positioning Enhanced backcheck. Specify EBC suffix Delayed action with pressure relief valve