Stackers has a welded and reinforced chassis for heavy loads, 1-stage or 2-stage lifting masts made of C-section profiles, dual chains and single lifting cylinder, fork carriage and wheels.Sealed hydraulic system with protected pump and built-in overload valve. This gives a long and trouble free lifetime. They all have a unique, very easy to pump quick lifting system which lifts 45 mm/stroke when in quick position. Stackers applies to EN1757.