Da Vinci Natural Bamboo Large Wood Cutting Board - 12 x 18 Inch Extra Large 12" x 18" cutting board made of Eco Friendly renewable 100% antimicrobial natural bamboo that will not dull your knife^0.71" (11/16") extra thickness for added durability compare to others on the market that are only 3/8" thick^The 11/16 inch thickness means it is made of vertically cut bamboo resulting in a much stronger board compared to thinner ones^Easy to maintain: once a month apply a small amount of mineral oil or beeswax rubbing with a lint-free cloth in the direction of the wood grain