Sanding Belt by POWERTEC. Introducing the2 x 42 Aluminum Oxide Sanding Belt 60 Grit by POWERTEC. POWERTEC 4 x 24" Sanding Belt 40 Grit Aluminum Oxide Sandpaper 20 PK 110060-P2. POWERTEC 4 x 24" 240 Grit Sanding Belt Aluminum Oxide Sandpaper 20 PK 110040-P2.