This 6″ square, non-asbestos, hard ceramic board is 1/2″ thick. Retains heat nicely and can be easily cleaned. Rubber feet raise boards above work surface. Very durable and smooth. Can be heated up to 2,000°F.  Fits our 8302228 (a handy rotating square soldering table which permits 360° access to your parts so that you can solder quickly and easily. Bearings in the base provide smooth, easy movement).