Material: Aluminium Oxide Disc Diameter: 5 inch (125mm) Connection Mode: hook&loop Grit Number: 80#,120#, 180#, 240#,320# ​Package Include: 12pcs x 5 inch mesh sanding discs​ Feature: Innovative design improves productivity and final finish while reducing costs Full-face vacuum ability for greater efficiency Removal of dust particles eliminates loading and pilling problems Woven mesh backing works with hook and loop attachment Can be used with portable, self-generating, or central vacuum systems