Thermo Fisher 250ul insert conical with high quality Insert, 250uL, Glass, Conical Bottom, for 15x45 Vial 100/PK 200 774 $32.98 Ordering Guide: Septa for 13-425 Screw Thread Caps Item Description Qty Cat. No. Qty Price Each Septa, 12mm, Red PTFE/White Silicone, 0.075" 1000/CS 200 590 Volume-Aijiren