9 in. 120 Grit (Medium) Drywall Sandnet Discs (25-Pack). Sandnet Drywall Discs With Reusable Sanding Technology Are The Most Advanced Sanding Sheets On The Market With Up To 10x Longer Life Versus Standard Sanding Discs. Each Sandnet Disc Features A Clog-Reducing Nylon Net Design Coated In A Premium Ceramic Blend Grit For Fast Material Removal While Reducing Material Build-Up. These Innovative Discs Are The Premier Solution When Seeking Ultra-Smooth Finishes When Sanding Drywall, Mud, And Plaster From Medium To Large Surface Areas. The Sandnet Design Is Easy To Clean And Reuse Multiple Times By Simply Shaking, Vacuuming, Or Rinsing The Sheet To Remove Any Pitch Build-Up.