500ml,24/40,Round Bottom Glass Flask,2-neck,500ML,Lab Boiling Bottle,Double Necks Material: borosilicate glass 3.3 Joints size: 24/40 Contact us: Please just contact us no hesitation via message system if you have any question about the items you interested in. We will be very glad to help you. We try our best to reply to your emails ASAP.
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