These are some watch glasses for laboratory use, can be used to do some evaporation of liquid, also can be beakers cover. Made of glass materials, safe and , they are helpful tools for laboratory teaching, school, chemical experiment supply. Simple structure with stable working performance, easy to use, let the fluid surface area increased, accelerate evaporation. Features -Color:Transparent -Material:Glass -Size:10.00X10.00X0.20cm/3.93X3.93X0.08in - Transparent, round and flat shape, sturdy, not easy to deform for long time to use. - Good for science experiment enthusiasts, testing institution, laboratory, chemistry classroom and more uses. - Made of glass materials, safe and , you can use with peace of mind. - It can be evaporating dish, also beakers cover, and also, the watch glass can be used as load carrier. - craftsmanship ensure its durability and practicality, offering you satisfying using experience. Package list: 10 glasses