TOC Vials: 40 ml, ND 24 mm, Screw Cap Cat. No. Description Pack Size VC2440CUSFT TOC/EPA Clear Vials 40 mL Screw Cap With PTFE/Silicon Septa 100 VC2440AUSFT TOC/EPA Amber Vials 40 mL Screw Cap With PTFE/Silicon Septa 100