PS-813B/E PASSENGER STAIRS Services aircraft with door sill heights 96-228 inches Lock valves on each pair of stabilizer hydraulic cylinders Fully illuminated steps and platform Pivoting extension platform A-frame locking mechanism SPS-3518 PASSENGER STAIRS Services aircraft with door sill heights 96-228 inches Dual control stations Aluminum diamond plate metal steps and platform Extension platform illuminated proximity sensor Stinar designed mechanical stairway ratchet lock and frame system SPW-500 POTABLE WATER 700 gal (2650 L) stainless steel tank Internal safety baffles to prevent sloshing in tank Wrap around bumper with grill guard Work lights located in rear pump compartment Top grip strut walkway and steps