Set of three (3) 16 ounce/473mL bottles of John Boos Mystery Oil, ideal for maintaining and preserving wood food preparation surfaces including: cutting boards, butcher blocks, countertops and utensilsProudly Made in the USA from all natural materialsOnce a month, John Boos Mystery Oil to your cutting board or butcher block and allow it to soak in overnight. Repeat the process more often when your board is new, or if you live in a dry/arid climateRegular oiling can prevent wood from drying, splitting and crackingNSF Certified (National Sanitation Foundation), and safe for use on food preparation surfaces1 Year Warranty: John Boos is proud to offer a one year guarantee against defects in workmanship and materials