Iron Drum Brake Shoes, Shape : circular

序号型号（Model）外径（Outer Diameter, mm）宽度（Width, mm）孔径（Bore Diameter, mm）材质（Material） 1 BW-160 160 50 40 铸铁 / Cast Iron 2 BW-200 200 60 50 铸铁 / Cast Iron 3 BW-250 250 70 60 铸钢 / Cast Steel 4 BW-315 315 80 80 铸钢 / Cast Steel 5 BW-400 400 90 100 铸钢 / Cast Steel