Seamless Cover - Round 9.5 + 11The first tool in the Seamless Form System, the Seamless Cover Round 9. 5 + 11, fits perfectly over the combination of GR Pottery Forms Round 9. 5 stacked on top of GR Pottery Forms Round 11. This combination is routinely used to make pie plates and other large round platters. By placing our Seamless Cover Round 9. 5 + 11 over your stacked 9. 5 + 11 round forms, you are provided a smooth surface that prevents the unsightly, and challenging to cure,