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Purple Coding System & Precision Fit : These purple 20ml vial caps snap on tool-free for a secure seal on standard 20ml glass, peptide, and sample injection vials. The green color enables quick visual sorting. Pair with peptide labels, a fridge case, and a 20ml vial case or holder for organized, secure peptide storage.Perfect as 20ml caps for vials, they also serve as 20ml glass vials protective vial caps.Fits Vials Necks 19.8mm-21.5mm in Diameter. Food-Grade Silicone, BPA-Free: Made from food-grade, BPA-free silicone, these peptide caps are safe for sensitive samples. Use them as vial caps covers peptide solutions—our 20ml vial caps covers peptide storage.Ideal peptide caps for vials, these peptide caps 20ml and peptide vial caps provide a safe and clean storage environment for your vials.Clean them easily; no BPA,highly hygienic，Suitable for use in laboratories, clinics, and by home caregivers Triple-Seal Against Leaks, Dust & Evaporation: Engineered with a tight-seal design, these purple 20ml vial caps covers work as protective vial caps against leaks, dust, and evaporation. Act as 20ml glass vials protective vial caps for your 20ml vials, keeping peptides and reagents safe. The triple barrier—leak-proof, dust-proof, and evaporation-proof—extends shelf life. Rely on peptide vial caps 20ml for 20ml vial caps covers peptide protection Glove-Friendly, Washable & Reusable: These purple 20ml vial caps press on and peel off effortlessly, even with wet or gloved hands. Wash and reuse them—an economical peptide caps for vial alternative to disposable covers. They fit standard 20ml vial storage case, 20ml vial case, and 20ml vial holder setups. Stow vials in a peptide case for fridge without removing caps. Pair with 20ml vial labels and peptide labels for 20ml vials for organized tracking Suitable for Multiple Scenarios: These purple 20ml vial caps designed for diabetes care, clinics, in-home care, and laboratory professionals. These peptide caps for vials / glass vial protective vial caps, provides leakproof & dustproof sealing for liquid storage in 20ml glass vials including insulin vials, vials for peptides, ampoules, zepbound vials , and others. Reduces moisture loss and extends shelf life ASIN B0HCC9S2ZN Item Weight 1.06 ounces Manufacturer KNOCKO Package Dimensions 3.46 x 3.39 x 0.75 inches