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Manufactured from polyethylene for perfect tight sealing of special test tubes. Large size flanges on the stopper perfectly touch to the walls of the tubes and offer the best leak-proof sealing. Grooved, conical body shape guarantees perfect closure. Color-coded stoppers enable fast, easy and practical identification of bottle content. -
Manufactured from heat resistant, durable borosilicate glass according to DIN 12252 standard. Hexagonal flat head prevents the stopper from rolling on the bench and avoids the breakage risk. A pointed, round formed “drip-tip” stopper lower end guarantees return of the adhered liquid back to the flasks. -
Manufactured from heat resistant, durable borosilicate glass according to DIN 12252 standard. Hexagonal flat head prevents the stopper from rolling on the bench and avoids the breakage risk. A pointed, round formed “drip-tip” stopper lower end guarantees return of the adhered liquid back to the flasks. -
Manufactured from polypropylene for perfect tight sealing for all NS joints. Hexagonal flat head prevents the stopper from rolling on the bench and avoids the breakage risk. The hallow form of the stopper head collects the adhered liquid and prevents the possible damage risk of the laboratory benches.

