13mm and 20mm matte finish flip cap vial seals manufactured by West Pharmaceuticals. West is the world standard in quality vial packaging components, including matte finish flip off vial seals used in the pharmaceutical industry. Several colors available.
West Pharmaceutical “matte cap” flip off seals do not have any words embossed in the plastic cap to comply with USP regulations on ferrules used in the pharmaceutical industry here in the USA. As an added benefit, the matte finish resists scratches while in transit, helping to maintain a clean, professional appearance.