3 Vent Caps

Three lab grade vent caps for storage of sulfuric acid and Alnochromix® mixtures. Releases outgassing to mitigate risks of breaking glass storage bottles.  Made of medical grade virgin polypropylene with a sonically welded PTFE 0.22 micron membrane. Meets USP Class VI biological tests for plastics.  Has a 38/430 thread for most sulfuric acid bottle types.