Neck opening diameter: 50 mm (2). Comes with a protective cover with strap. Check out my other items. The item "10L Liquid Nitrogen LN2 Storage Tank Container Cryo Dewar w Canisters Strap New" is in sale since Monday, July 11, 2016. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Other Healthcare, Lab & Dental".The seller is "changbio" and is located in Fremont, California. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia, New Zealand, Egypt, South africa, Reunion.