Beaker cover:can be used to do some evaporation of , but can't be heated like an evaporating dish,watch glass
Multifunctional: can be used as an evaporating dish, can be used as a lid, can be used as a container, can be used as a carrier,evaporating dish covers,chemistry glass equipment
: glass, can use it with confidence,laboratory glass equipment,watch glass
Thickened watch glass:thicker glass design, more sturdy, not easy to break,watch glass
Accessories:cover evaporating dish or beaker to prevent from falling into,watch glass