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15mm x 45mm Neck size 13-425, for lab samples, high purity chemicals, strong acids/ solvents, and pharmaceuticals 4 mL (1 dram) Amber Glass Vials, Green Teflon-Lined Caps. Amber vials offer protection from harmful light and UV rays for light sensitive products. Made of Type I Borosilicate glass, providing exceptional resistance to heat shock and chemical leaching. The glass is non-porous and has no catalytic affect. Because the boron oxide particles in the glass are so small, the silicate is held more closely together, resulting in a much stronger glass for your laboratory needs.

Attached Green Thermoset Caps with F217 Teflon PTFE Liners provide a wide range of chemical compatibility and temperature tolerance. The foam backed Teflon® PTFE resists attack from virtually all chemicals at room temperature and provides resilience for a tight seal. Thermoset closures cannot be remelted after they are formed. Common Thermoset cap resins include urea, phenolic, and melamine.

Typically ships from Pennsylvania. Call (888) 322-5722 for availability.