1 1/8" MDF with lminate. Ideal for constructing router tables or other work surfaces where flatness and smoothness is required. Your choice: $2 each, $24 for the whole lot 2 x 32 x 49 1 x 22 x 51 1 x 23 x 43 1 x 23 x 49 1 x 23 x 41 1 x 21 x 49 1 x 24 x 36 1 x 21 x 65 1 x 24 x 45 1 x 24 x 65 1 x 24 x 79 1 x 23 x 57 1 x 24 x 35 1 x 15 x 97 1 x 18 x 97 1 x 25 x 49 1 x 27 x 63