Tempered glass cutting boards. We use high-quality, sturdy tempered glass made in the USA. The artwork is added to the glass using a heat-transferring process that allows for it to stay intact despite use. This glass cutting board is heat-resistant to 500 degrees. It has rubber feet on the back to secure it from sliding and to protect your surface. The colors look bright and rich on our cutting boards. They are extremely durable and sturdy. They are perfect as glass cutting boards or a charcuterie board. They are also a great decorative kitchen piece. • CARE INSTRUCTIONS: Dishwasher safe. PLEASE ALLOW 2 WEEKS FOR THESE TO SHIP.