3M Cubitron II 34447 737U Series Multi-Hole Clean Sanding Sheet Roll, 70 mm W x 12 m L, 220+ Grit. Series: 737U. Ideal for auto body repair tasks like paint removal, body filler shaping, and final sanding before painting, the 3M Cubitron II 34447 is a perfect choice for professional and DIY detailers.