... brand of out purchases; 3.various of kinds building material machine; Baking-free brick machineLow prices, high quality, integrity, common developmentRoll ... diameter (mm): 280~320 ~ 380,420 ~ 480,520 ~ 610~800Roll diameter (mm): 280~320,320 ~ 380,420 ~ 480,520 ... ~ 610,610 ~ 700,700~800Roll body length (mm): 650,650,650,760, ...