Screw thread vials and caps • Large neck opening vials with 9mm neck finish • 1.8mL volume, standard size of 12x32mm diameter x height • Excellent for long term sample storage • Clear vials made from Type I Class A and B glass (33/51 expansion) • Amber vials made from Type I Class B glass (for light sensitive product) • Manufactured to precise standards and 100% guaranteed • Caps available with pre-slit septum (PTFE/Silicone)