Detailed Product Description Glass lids, tempered glass, glass cover1. The diameter is from 80mm to 300mm.2. Thickness: 4~5mm3. Shape: Round, Oval, Square4. Float glass5. High transparency6. High surface hardness: 5 or 6 times of that of normal, hard to break, safe to use.7. The heated stabilization can reach from 20 to 200 degree temperture.8. Can reach 225g / 2m impact test.