3M™ Exhalation Valve 6889/07143(AAD), 10 ea/Bag Belts 3M™ Secondary Liner 4988 is

3M™ Secondary Liner 4988 is a tan-colored

All-Purpose Sanding Sponge

May be used on both ceramic and non-ferrous wheels

It Is 80 Grit

Low stretch backing gives the disc added stiffness

3M™ Exhalation Valve 6889/07143(AAD), 10 ea/Bag Belts 3M™ Secondary Liner 4988 is3M SKU: 7000002057 Lead Time: ~2 days For use with the 3M Half Facepiece Respirators 6000 Series. Approved 3M replacement part; Recommended for 3M Half Facepiece Respirator 6000 Series (sold separately); Replaceable part can potentially result in respiratory equipment cost savings; Replacement part can extend service life of facepiece; Valve maintains original service performance of facepiece