MFG Glass Lid Material:All product make by the float glass.Glass color can be clear,white, green, blue, brown etc. Thickness: 4-5mm Material of edge: According to customer's demand, can adopt stainless steel: SS201,SS202,SS304and environmental protection as liquid silicone. Shape: Can produce round, oval, square, special-shaped tablet and shapes. Diameter: φ80mm φ 480mm Hole:According to customer requirements in the glass cover any position of hole diameter drive arbitrary Testing: 1 heat test: put glass lid into oven temperature to 200 °, and constant temperature for 30 minutes, remove immediately into 20 ° water glass, no broken or crack, 2 impact resistance test: 225g ball from 1.25 metres in free fall in glass lid 1/3 radius, so after three times over without damage or glass cracks, 3 test: use 120 # pressure within the cover glass sand friction surface 15 times, and quiet place after 24 hours, no broken or glass cracks, 4 destructive testing: add forces will cover glass broken 5X5cm measuring range, the number of particles, 4mm thick glass more than 60, 5mm thick glass than 80, and all particles into shape, the biggest grain weight does not exceed 4.25 g, 5 the dishwasher test: will cover glass washing 50 times in the dishwasher,there is not turn to yellow, dark on the glass lid ,without loosing phenomena and deformation. Function:Our new products are many according to environmental protection, safety, save energy, health, easy place, easy cleaning features to design and development. Speciality.:Automatically puts steam, water circulation in the cookware, long service life, safe, environmental protectione