Filter flasks, Erlenmeyer shape, borosilicate glass 3.3 Borosilicate glass 3.3 with thick walls according to ISO 6556 and DIN 12476 standards. The glass side arm or the Polypropylene side arm is suitable to work with 6mm to 10mm hose diameters. The Polypropylene side arm has a screw thread connector for easy and safe fitting of the tubing.
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