Size:100/115/125/150/180mm 4"/4.5"/5"/6"/7" For automotive, metal. Abrasive Aluminum oxide. Grit P40-P320 Size 4"(100mm), 4.5"(115mm), 5"(125mm) 6"(150mm), 7"(180mm) Application Widely used for metal surface, welding field, automotive and ships industry.