John Boos 4 Piece Care and Maintenance Kit with Rectangular Walnut Cutting Board, 20 x 15 Inch Set includes one rectangular reversible cutting board, one bottle of mystery oil, one bottle of block board cream, and one care and maintenance instruction sheet Cutting board fabricated from solid walnut with a reversible design Mystery oil is made from a mixture of food safe mineral oil, linseed oil, orange oil, and beeswax Board cream is made from unbleached beeswax combined with food grade mineral oil End grain construction of cutting board keeps knives sharp