Manufactured from polyethylene for perfect tight sealing of specially test tubes. Large size flanges on the stopper perfectly touch to the walls of the tubes and offer the best leak-proof sealing. Manufactured from EVA for perfect tight sealing of 5 mm test tubes. Large size flanges on the stopper perfectly touch to the walls of the tubes and offer the best leak-proof sealing. Manufactured from chromated, nickel plated brass with sharped cutting end. Specially recommended to drill different size bores to cork, rubber or silicone stoppers. Large handles offers a good grip for faster drilling speed. Set consists of 6 different pipes with diameters starting from 4 mm to 18 mm. Supplied cleaning rod guarantees fast and effective cleaning of the residues remaining in the cutting pipes. Manufactured from chromated steel for sharpening the worn, blinded borer pipes. Consist of plated metal cone with hinged cutter blade set in slot and a handle. The sharpening knife is manufactured from hardened steel. Grooved, conical body shape guarantees perfect closure. Color coded stoppers enable fast, easy and practical identification of bottle content.

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