Specification:Withstand temperature: -20~120℃ / -4°F ~ 248°FVials cap material: aluminum, plasticVials stopper material: butyl rubber stopper/silicone stopperVials material: glassVials height: 70mm/2.8inchVials entrance diameter: 20mm/0.79inchVials diameter: 24mm / 0.94inchPackage list: 100 pcs 20ml small vials with caps and rubber stopperMaterial: These mini vials are made of solid glass, more resistant to thermal shock (temperature range: -20~120℃ / -4°F ~ 248°F). Comes with a secure-fitting plastic aluminum caps. Equipped with a butyl rubber stopper that is durable, washable, reusable and corrosion-resistant.Good sealing: The equipped aluminum cover and rubber stopper ensure the tightest seal and reduce the possibility of sample evaporation.
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