These are PTFE seals, designed to fit inside the top of solid GL-14 caps.
These handy little circles make the seal airtight. These seals were designed for solid caps (not caps with an aperture).
Note: This product is a seal, not a cap!
These are PTFE seals, designed to fit inside the top of solid GL-14 caps.
These handy little circles make the seal airtight. These seals were designed for solid caps (not caps with an aperture).
Note: This product is a seal, not a cap!