NSI Seam Phantom Pads Concrete Polishing SystemWe really like the cutting and polishing action of these turbos. These are the turbos we supply with the seam phantom (60, 150 and 300 grit) to produce almost invisible seams. Use these for any job that requires ultimate control over the amount of material removed and the flatness. Available in 7 grits from 60 to 3000.