Description Are you looking for clear watch glass? Our products can meet all your needs. Thick borosilicate glass is safer and can be used with confidence. High transparency, easy to observe the experimental results. High borosilicate glass, so you can use it with confidence. Features - Color:Transparent. - Material: Glass. - Size 1:15.00X15.00X1.50cm/5.89X5.89X0.59in. - Size 2:12.00X12.00X1.50cm/4.72X4.72X0.59in. - Size 3:10.00X10.00X1.50cm/3.93X3.93X0.59in. - Size 4:7.00X7.00X1.50cm/2.75X2.75X0.59in. - Diameter: 70mm,100mm, 120mm,150mm. - Powerful laboratory glass watch glasses with multiple uses in the classroom or laboratory. - In addition to covering beakers and flasks, watch glass can also be used to place samples under low magnification microscopes. - Polished edges and polished surfaces provide a safe product for handling in the classroom or laboratory. - High borosilicate glass with high chemical durability, thus preventing solution contamination. - Versatile, can be used as evaporating dish, can be used as lid, can be used as container, can be used as carrier.Package list: 2 x 70mm beaker covers 2 x 100mm beaker covers 2 x 120mm beaker covers 2 x 150mm beaker covers