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Hollow with drip tip and hexagonal grip. BRAND™ BISTABIL™ Borosilicate Glass Conical Ground Joint Stopper is constructed from Boro 3.3 to DIN 12252 standards.
Solid or semi-hollow with octagonal grip. BRAND™ Borosilicate Glass Conical Ground Joint Stopper is constructed from Boro 3.3. to DIN 12252 standards.
Boro 3.3 honed stoppers