Bracket:Made of heavy pressed steel, with double ball bearing in theswivel head, strong central kingpin, swivel head seals. Thespecial Blickle dynamic riveting process of the swivel headresults in minimal swivel head play and smooth rollingcharacteristics with an increased service life achieved by thework hardening of the ball race grooves. Bolted wheel axle.Zinc-plated, blue-passivated, Cr6-free.Wheels:Tyre & running tread: Made of high-quality, reaction-injectedpolyurethane-elastomer Blickle Extrathane®, low-noiseoperation, low rolling resistance, good floor preservation, veryhigh abrasion resistance, high cut and tear propagationresistance, very good chemical connection with the wheelcentre.Tread colour:light brownRim / wheel centre: Made of die-cast aluminium. Casted tread.Variants:With ‘stop-top’ brake