Norton Flap Disc BlueFire R822 ZA, 4.5" x 7/8", Fiberglass Hub, Flat T27 Grit:P40 Grit ($19.00 per disc, sold 5 per box) The polyester film backing offers

The polyester film backing offers a tough durable base that won't crack or fall apart under even the toughest sanding conditions

fiber‑reinforced B‑weight latex backing

also available in smaller sizes

Great protection against blisters

Made of stainless steel

Norton Flap Disc BlueFire R822 ZA, 4.5" x 7/8", Fiberglass Hub, Flat T27 Grit:P40 Grit ($19.00 per disc, sold 5 per box) The polyester film backing offersProduct Overview: Norton BlueFire R822 ZA Flap Disc 4. 5" x 7 8", Fiberglass Hub, Flat T27 Shape is a high performance zirconia alumina plus abrasive that extends the life of the disc up to 30 percent and provides a consistent cut during coarse grit blending, deburring and stock removal. The jumbo semi open flaps reduce loading when used on soft metals and the fiberglass resin backing plate absorb vibrations, improving operator comfort. The tough yet