Type:T27(flat) Layers: 4-14 Washer: 1 or 2 or as requirement Inner diameter: 16mm,23mm(Tolerance:0.1mm) Outer diameter: 75mm,85mm,90mm,95mm,107mm,117mm,140mm,170mm, 180mm Back: one black paper, or one layer non-woven cloth, or customers' own label Applications: Used as the backing pads of Flap Disc,Mop Disc and Flap Wheel. The excircle of backing disc id dealed with polishing without burr,The discrepanly of external diameter is less than 1mm,Can be customer-made diameter,thickness and layers. The angle of backing pads can be made in 8¡ãand 9¡ãalso twin plate. The backing plate surface can be made-in no-woven cloth and black paper. As the biggest factories in China , we manufacture more than 150,000 pieces of fiber glass backing pads per day which are mainly used for flap disc manufactures. With advanced technology and excenlent quality, products made in our factory are sold well not only in Asia , but also in more than 20 countries and areas of the world. 50 pcs in 1 plastic bags and then put in to box according to their size. Carton,Pallet