Our product name is HAMAG bottle diameter 20mm 20ml crimp top clear headspace vial flat bottom borosilicate for GC GCMS instrument with aluminum caps. We are a factory that produces high-quality laboratory equipment. Our HAMAG bottles are made from borosilicate glass, ensuring their durability and ability to withstand high temperatures. These vials have a clear headspace, meaning that you can see the contents of the vial with ease. They are perfect for GC GCMS instruments. The aluminum caps provide a secure seal to keep your samples protected. Order now and get the best laboratory equipment from our factory.