produced by high boro 3.3 glass or low boro glass clear low expansion linear-coefficient,high resistance against chemical attack Test Tube,cylindrical bottomproduced by high boro 3.3 glass or low boro glass clear low expansion linear-coefficient,high resistance against chemical.Specific point model are shown below:ModelDescriptionpackingDimensions(mm)RK110013ML PS cylindrical test tube 500PCS/ ...