... use in shopping mall, storeroom. 1. WheelMaterial: Grey rubber wheel, Cast iron or PP coreBearing: Roller bearing or Steel bushingHardness ... : 2mm, 2.5mm, 3mm3. CasterType: Swivel, Fixed, Swivel with brakeMounting: Top plate, Threaded stem, Grip stem, Bolt hole.Load ... Quiet SlidingExcellent FlexibilityExcellent Water ResistancePoor Grease Resistance Grey Rubber Wheel With Swivel Top Plate And Brake