Model 170 services doorsill heights up to 170.5" (4.3 m) and meets SAE ARP 836 and 1247. A tubular wrap-around steel bumper deflects ramp impacts—helps protect both the stair and other ramp equipment. Modular engine/transmission package makes maintenance and repairs quick and simple.Available in Gas, LP, Dual Fuel, Diesel & Electric (AC & DC). Electric field retrofit kits also available.