38 Starting Recommendations Material Best Performance General Duty Unfinished Metal A275 A251 Primed/Painted Surfaces A275 A251 Fiberglass/Composites A275, H875 A251, H290 Bare Wood A275 A511, A513, A514 Clear Coat Sanding   T402 Sealer Sanding A275, A251 A413, A414 Lacquer Sanding T402, T414 Wet Sanding T402, T414 T247, T461 Paint Stripping A275, H875 A290, H290 Drywall Sanding Q421 A412 All Purpose Dry Sanding A212, A213, A211 Paper Sheet Competitive Cross Reference Norton 3M Hermes Klingspor Mirka VSM A211 230U, 240N, 346U KP31C A212 210N HFB PL31 A213 230N HFB PL31 KP31B A275 214U, 216U, 334U HC133, HCAB PS33 Q - Silver, Royal — A290 236U, 316U HCAB PS33, PL36 Bulldog Gold KP911 A413 414N, 415N PSF - LL, SA167 PL35 Carat(B) CP131A A511 110N A513 130N GCAB A514 140N GCAB H875 750U, 751U, 740I, 745I — — Royal Coarse Cut KP510E,   KP709 T402 401Q WSFlex18B PS11 Waterproof (A) CP918A   T414 413Q WSFlex18B PS11 Waterproof (A) CP918A T247 213Q PS12 T461 438Q, 431Q WSFlex18C PS11 CP918C Recommended Backing Weight A - WT B - WT C - WT D - WT E - WT Most Flexible/ Stiffest/Strongest Most Lightest Applications Aggressive Applications   Catalog 5 Pkg . 10 Pkg . Size Std . Pkg . Spec . Order No . Price Ea . Pkg . Price Ea . Price Ea . 9 x 11 25 A211 40 - D NOR00330 $ 29 . 70 $ 28 . 22 $ 26 . 73 9 x 11 50 A211 60 - D NOR00320 43 . 14 40 . 98 38 . 83 9 x 11 50 A211 80 - D NOR00315 38 . 16 36 . 25 34 . 34 9 x 11 50 T461 80 - C NOR01170 62 . 72 59 . 58 56 . 45 9 x 11 100 A413 100 - B NOR00800 52 . 33 49 . 71 47 . 10 9 x 11 50 T461 120 - C NOR01160 47 . 43 45 . 06 42 . 69 9 x 11 50 T461 150 - C NOR01155 44 . 23 42 . 02 39 . 81 9 x 11 100 A251 P180 - A NOR84104 50 . 14 47 . 63 45 . 13 9 x 11 100 A413 180 - B NOR00803 52 . 33 49 . 71 47 . 10 9 x 11 50 T461 180 - C NOR01150 42 . 54 40 . 41 38 . 29 9 x 11 100 A251 P220 - A NOR84103 50 . 14 47 . 63 45 . 13 9 x 11 100 A251 P320 - A NOR84100 50 . 14 47 . 63 45 . 13 9 x 11 100 A251 P400 - A NOR84098 50 . 14 47 . 63 45 . 13 9 x 11 Paper Sheets