Amtico Stone 18 x 18 Stria Rock: 5.84 S/FT, covers 20.000 per S/FT, contains 45.000 per Box, measures 18.000 Inch long, 18.000 MM wide, 2.500 Inch thick, weighs 34.000 lbs, in the Gray color family, composed of Vinyl, features a Ceramic finish, Smooth surface type, Beveled edge type, Square end type, has a 25 year warranty