It is specially made for making flap disc. The plates are made of the fiberglass which are specially woven and treated in our plant. Special sizes are available on request 80% of our products are for international market. Specification: Type: T27 (Flat), T29 (Convex) Material: Fiberglass fabric impregnated with phenolic resin Metal ring: 1 or 2 Layers: 6-13 Thickness:2.4 mm-3.5 mm (Tolerance:0.3 mm) Outer diameter: 75 mm ,85mm, 95mm, 107mm, 117mm, 140mm, 170mm,180mm Prices: In accordance with the layers of the backing pads Packing: Each roll is wrapped in a polyethylene bag and put into cardboard boxes of different size according to their diameters. Boxes are placed on pallets.which are wrapped with plastic films of two or three layers.