Black rubber tyre, thermoplastic, with mounting plate, offered as a set, 2 swivel castors with double stops and 2 swivel castors, wheel x width 50 x 19 mm. Supplied = assembled. Wheel diameter = 50 mm. Structure = swivel castor, swivel castor with double stop. Scope of delivery = 4 swivel castors, 2 with double stop. Wheel material = rubber - thermoplastic rubber elastomer (TPE) Material of rim = polypropylene. Housing material = steel. Max. load at 4 km/h = 40 kg. Type of mounting = with top plate. Wheel width = 19 mm. Overall height = 70 mm. Wheel bearing = plain bearing. Temperature resistance = -20 C to +60 C. Swivel castor offset = 25 mm. Screw hole diameter = 6 mm. Swivel castor plate dimensions = 60x60 mm. Screw hole spacing = 38x38 - 46x46 mm. Housing surface = powder coated. Shore hardness = 85 A. Non-marking tyres, hardwearing. Low rolling resistance, smooth running. Non-leak tyres. Housing made of black powder coated sheet steel, swivel bearings with double ball bearing race