6 Rollers, particularly bearing rollers, guide rollers, carrying rollers and reversing rollers, tension rollers; metal posts; rails, frames, plates, flooring and pallets; metallic parts for conveying and automation installations, for storage and order preparation installations, and for devices and installations for flow shelving and handling of stored and transported materials; pulleys, pinions, chain wheels, chains for circular conveyors; balls, bolts, screws, nuts; machined parts for fastening, in particular threaded parts, screw terminals, threaded plugs, threaded rings, spring terminals, plug-in adapters, plug-in couplers, plug-in pins, clamps, lock collars and fastening parts; all the aforesaid goods made of steel, aluminium or other metal or made primarily of said materials