Research on solvent-free Cordite RDB continued primarily on the addition of stabilizers, which led to the type commonly used in World War II as the main naval propellant. In Great Britain this was known as "Cordite SC" (= Solventless Cordite). Cordite SC was produced in different shapes and sizes, so the particular geometry of Cordite SC was indicated by the use of letters or numbers, or both, after the SC. For example, SC followed by a number was rod-shaped cord, with the number representing the diameter in thousandths of an inch. "SC T" followed by two sets of numbers indicated tubular propellant, with the numbers representing the two diameters in thousandths.