Amtico Stone 12 x 18 Composite Pumice: 6.09 S/FT, covers 45.000 per S/FT, contains 30.000 per Box, measures 18.000 Inch long, 12.000 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