... 1.toughened glass cover 2.toughened glass(4mm thickness) & food grade silicon . 3.size:dia24cm,dia26cm,dia28cm,4mm thickness toughened glass cover,glass cover , ... tempered glass cover Item NO.KI-34 toughened glass coverDimensionsize:dia24cm,dia26cm,dia28cm,4mm ... design for pure silicon products and mixed material products. glass cover