hmmmm may be BAL is sourcing tanks from diff vendors, and the internal volume of the tank varies between 15 to 21 L depending on the vendor, so they quote the smallest tank volume to be on the safer side :-D
just a joke guys .... kyo ki mei bhaut dukhi hooo .... today my office has blocked gmail ... so will be posting my PJs at EOD from home only :-) njoy maadi Anupam Kanssal
