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Neutral Glass Dropper Tube. Pharmaceutical Grade Glass: Low Borosilicate Glass COE 5.0 & 7.0 with Type I Hydrolytic Resistance. Dual Color Options: Available in Clear and Amber colors for various pharmaceutical applications. ISO and FDA Certified: Meets international safety standards for medical vial and ampoule manufacturing. Precise Dimensional Tolerance: Strict tolerance control on Outer Diameter and Wall Thickness for consistency. Custom Logo Printing: Option to print custom logos on the glass tubes for branding. Flexible Packaging: Packaged in shrink wrap bags and cartons for safe transport. Fast Lead Time: Off-season delivery within 15 workdays; peak season within one month.