Honeycomb nuggets measure approximately 13.3 x 9.3cm, blank solder plates measure approximately 14.5 x 11cm, suitable for handmade jewelry, please check these refractory before buying Brick size information The honeycomb jewelry making board is mainly made of ceramic which is to 1450 degrees Celsius and the other is mainly made of quartz which is to 1700 degrees Celsius, both are heat , and long lasting Our jewelry welding kit can be widely used in jewelry making, and can also be used as an auxiliary tool for jewelry repair, metal welding, etc. There are slight cracks on the of our refractory bricks, which is a normal phenomenon, because the material itself has cracks, you don't need to worry about the performance; in addition, please be careful when moving this board Material: Quartz+Ceramic colour: White Package Contents: 1 x Honeycomb soldering board(about 13.3 x 9.3cm) 1 x Quartz board(about 14.5 x 11cm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.