Screw Neck ND18 vials manufactured from 1st hydrolytic class borosilicate glass with flat bottom. They can be purchased with a variety of polypropylene seal styles and septa materials.

• High performance caps/septa
• Quick assembly

Screw top vials and caps are recommended for the tightest seal and the most reproducibleheadspace results. Headspace vials and caps are precision-thread, making them an excellent choice for dependability and ease-of-use. They are ideal for applications inthe environmental, food and beverage, industrial hygiene, drug analysis, and clinical chemistry industries. A rounded bottom is more sturdy and thus more resistant to the high pressure within the vial during the heating process.