... adopt 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 for ... , there is not turn to yellow, dark on the glass lid , without loosing phenomena and deformation.Function:Our new products ...