MS333+C - 4.5 litre Enamelled Steel Dilvac Dewar Flask (with clamp lid attachment, vent and handle)Dilvac Dewar Flask MS333+C litre Dewar Flask, ready to use. Rust and corrosion resistant. Enamelled Steel Container (with clamp lid attachment, vent and handle). The Dilvac Blue Enamelled Mild Steel Dewar Flask range offers a cost effective solution for the storage and transportation of cryogenic liquids such as liquid nitrogen, oxygen, and dry ice. Featuring a durable, rust and corrosion resistant blue enamelled steel exterior and a high quality