material:borosilicate 3.3 color:brown with glass stopcock certification:ISO 9001 (1)all types:10ml 25ml 50ml ... china. Main products includes beakers, conical flask, boiling flask, reagent bottle, measuring cylinder, volumetric flask, measuring pipette. Ect. Should you be ... interested in our products, please contact us. 25ml,with glass stopcock,Class A,Base burette