1. Size: any size can be ordered (width: under 24 inches).
2. Backing:
   . Ewt cylinder paper for No. 40 ~ 240
   . Combination: Ewt. & cloth for No. 24 ~ 50
3. Grain:
   . Aluminum oxide
   . Silicone carbide
4. Application:
   . Combination: for floor sanding
   . Wet: for furniture and plywood