Multipurpose, borosilicate glass vial designed for storage and shipment of small volumes. Cone-shaped interior allows maximum retrieval of contents by syringe or micro-pipette. Ideal for iodine131, iodine125 and other isotopes. Packed in convenient, reusable plastic transport or storage boxes with hinged lid and foam cells. For use with 5532-38 Aluminum Seals with PTFE-faced rubber septa.