free sample EPA vials PTFE silicone septa with cap GLC-003 | Clear Screw Thread Vial PP Hole Cap & PTFE Item no. GLC-003 at Qorpak.com: 27.75 x 95mm, 0 dram (40ml) Clear Borosilicate Glass Vial with 24-400 Green PP Hole Cap & PTFE/Silicone Septa attached