Headspace Vials found in: Headspace Vials, Headspace Vials, Seals For Headspace Vials, Round Bottom Headspace Vials, Screw Thread Headspace Vials,.. and Carlo Erba. Manufactured to exacting tolerances. Use with 20 mm crimp caps. Rounded-bottom headspace crimp top glass vials (2714S36, S37) Use with headspace and CTC headspace.