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Conical flasks, Narrow Neck with Graduation. 3.3. Borosilicate. 500ml, Inner Neck Diameter 30mm. Neck sizes may vary.
![Rubber Stoppers/Rubber Bungs 1 Hole Pk 10 Bottom 29mm [1162]](https://www.betterequipped.co.uk/media/catalog/product/cache/a4577392614353b76a2e1713f4979a11/s/t/stoppers_1_hole_7.jpg)
![Rubber Stoppers/Rubber Bungs 2 Hole Pk 10 Bottom 29mm [1493]](https://www.betterequipped.co.uk/media/catalog/product/cache/a4577392614353b76a2e1713f4979a11/s/t/stoppers_2_hole_6.jpg)
![Rubber Stoppers/Rubber Bungs Solid Pk 10 Bottom 29mm [1158]](https://www.betterequipped.co.uk/media/catalog/product/cache/a4577392614353b76a2e1713f4979a11/1/1/1158.jpg)
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