60H-30 : wheel diameter:60mm Groove width :30mm 80H-30 : wheel diameter:80mm Groove width :30mm 80H-35 : wheel diameter:80mm Groove width :35mm 80H-40 : wheel diameter:80mm Groove width :40mm 80H-45 : wheel diameter:80mm Groove width :45mm 100H-50 : wheel diameter:100mm Groove width :50mm 100H-55 : wheel diameter:100mm Groove width :55mm 100H-60 : wheel diameter:100mm Groove width :60mm 100H-70 : wheel diameter:100mm Groove width :70mm 100H-80 : wheel diameter:100mm Groove width :80mm 100H-90 : wheel diameter:100mm Groove width :90mm 100H-100 : wheel diameter:100mm Groove width :100mm Heat resistance, put on resistance, lubricity, shock absorption and sound soaking up Package number : 1 pcs Stainless Steel kitchen utensils spoon stockpot kitchen materials utensils