Borosilicate Glass Test Tubes

Made of borosilicate glass or 3.3 borosilicate glass. Borosilicate glass tube suit for general mixing,simple laboratory work,as well for use with samples which are susceptible to PH change,will withstand moderate warming(e.g. in water bath).Meets ASTME890 specification,standard specification for disposable glass culture tubes.3.3 borosilicate glass tube suit for all usual laboratory applications,will withstand temperature change up to 500℃ and including boiling of samples,as well highly chemically resistant.Meets ASTME982 specification,type IV requirements standard specification for laboratory glass test tubes.

With rim or w/o rim. W/o rim test tube is a flat mouth glass tube with a round bottom.Flat mouth, easy to disinfect and kill bacteria at tube mouth. With rim test tube is a round bottom glass tube with a curling edge at the mouth. Rim is used to increase the mechanical strength, and is easy to clamp and not easy to fall off.

Round bottom, cork stopper optional.