HIGHDRIL wet diamond polishing pads,highdril 6pcs 4 inch #30,for granite marble sanding used on grinder or polisher

Wet Working,Diamond grits: #30,Size of 4 Inch,6PCS/Pack | Wet polishing for Marble Granite Quartz | The Recommended RPM: 2200, the Maximum RPM: 4500; Available in individual grits or sets | Free eBook: Polishing Process Step by Step and Valuable Polishing Techniques | With water hole for wet polishing as well as dry stone polishing