Slab Trolley with Rails: Manual Machine used at Building Construction Sites for slab castings. CAPACITY : 500 kg. (net weight) or 0.3 cubic meters TROLLEY : For easy material ejection, swivels in 360 around its axis and can be tilted at 90. RAILS : It Made with 40 mm dia, pipe with left and right beads. WHEELS : C.I. Heavy duty wheels with ball bearings.