100% Food-grade Silicone. Non-stick , Easy To Separate, Clean, Eco-friendly,low Carbon, Can Be Recycled Simple And Useful, Healthfulness,natural Antibacterial,High Strength Softness,corrosion Resistant And Adaptability Not Easy To Damage,No Crack,Resistance To Extreme Temperature,-40 C230 C,(-40 F446 F) Safety,Non-toxic, No Smell , Heated Evenly Size :18x11.5x4 Cm