Glass Lid Material: float glass. Glass color:clear,white, green, blue, brown etc. Thickness: 4-5mm Edge: SS201 SS202 SS304 & SRG-1 Glass ... stainless steel: SS201,SS202,SS304and environmental protection as liquid silicone.Shape: Can produce round, oval, square, special-shaped ... of hole diameter drive arbitraryTesting:1 heat test: put glass lid into oven temperature to 200 °, and constant temperature ...