Mirka Abranet 3" x 4" Grip Sanding Board Sheets (9A-129 Series) is a revolutionary mesh abrasive for vacuum sanding operations that will fundamentally improve your shop environment!This unique patented sanding material contains thousands of small holes, making it possible to effectively vacuum away dust and other particles without clogging the abrasive surface. The result is a uniform sanding pattern and a perfectly smooth surface and a work environment is free of dust.Abranet has a much longer lifetime longer than traditional paper abrasives, typically outlasting paper discs 3 to 5 times! This means that sanding can be carried out more efficiently at a lower overall cost.These Abranet sheets are conveniently pre-cut in 3" x 4" size and designed for use with inline sanders and sanding blocks with grip backing.