Bpa-free silicone: All thermal mats are made of silicone. Can withstand high temperatures or temperatures from - 105F to 250F. Can be used for baking, barbecuing, and cooking on the stovetop and microwave. Set of base plates: round 20 (cm) cm in diameter. The dimensions of the two square silicone pot holders are 18 x 18 cm. Round and Square Silicone Cooking Mats: Use our Large Silicone Heating Mats Kit to treat hot plates, pots and pans using a pot holder consisting of two round silicone cooking mats and two square silicone honeycomb mats. Actual color may vary due to differences in lighting. Quality Kitchen Tools: Each large silicone pan has a corner hole for easy hanging. It can be used as a coaster, drying mat, can opener gripping mat, spoon holder, garlic peeler and pan support mat. Honeycomb design at the bottom of the kitchen: The innovative honeycomb pattern creates a non-slip surface to prevent water damage without absorbing odors or creating mold. Flexible and Durable Silicone Potty Mat: Our collapsible potty holder kit is thicker than traditional kits. They are durable and flexible. These silicone pots are easy to store, wash and hang to dry easily.