Mechanical Dock Leveller - MHE-Perfect. Available in 6′ and 7′ widths and up to 8′ lengths. 30,000lbs (13.6t) capacity ratings. Heavy-duty box-beam under-deck support. Maintained tilt design compensates for uneven loading conditions. Working range +/- 12″ (+/- 300 mm) up/down. Fail-safe safety design.