Product Code: 420074-1000 These filtering flasks feature heavy-duty rims to reduce chipping, white, permanent graduations, and large marking squares. Made from high-quality borosilicate tubing with a low coefficient of expansion. Borosilicate tubing also provides uniform wall thickness resulting in the optimum balance between thermal shock resistance and mechanical strength. Heavy-wall borosilicate glass construction 1000 mL capacity Integral side arm for vacuum filtration Suitable for Büchner funnels and membrane filtration Flat, stable base Permanent graduations Narrow neck compatible with standard laboratory stoppers Excellent thermal shock resistance Chemical-resistant glass Autoclavable Reusable laboratory glassware Volume Graduations Height O.D. Stopper Size 1000 ml 50 ml 245 mm 138 mm #8