The Lucky Clover Trading LBL24CG-W W Wood Block, 24" L, Charcoal Grey Wall Letter, Gray All wood letters are uppercase and letters vary slightly in width Back of letter has velcro that attaches to our small wood slat board (Model 3300B or Model 3300G) Material: wood These wood letters are sure to enhance the decor of any room in the home The back of the letter also has a slot for hanging; mounting hardware not included