... : 38mm, 51mm or 63mm4. Base cover: Stainless steel, Coniform or flat;5. Ballast base: Caster iron or metal galvanized ... ; diameter is 320mm or 350mm;6. Rubber ring: preventing base from abrading effectively.7. Belt: Velert, nylon, Color optional ... accident; Use occassion: Bank, Supermarket, Shopping mall, Exhibition, Station, Airport, School, Hospital, theaters, Gymnasium, Warehouse, Plant and so on, ...