17 x 60mm 2 dram (7.5ml) Clear Borosilicate Vial with 15-425 Green Thermoset F217 & PTFE Lined Cap attached, Cleaned for Volatiles. Clear VOA Vials or borosilicate glass vials KaptClean® for Volatiles are designed for EPA volatile organic analysis (VOA.) Volatiles are chemicals that have high vapor pressures at room temperature (easily evaporate.)