While it's a pretty safe bet to say that a Mandocaster will weigh a lot less than an Airline H78, there are a number of variables that can affect an instrument's final weight. After all, wood is an organic material; even two of the exact same models built at the exact same time and using the same materials can have a different weight. For this reason, any weight measurements published on our website are to be considered as averages only. Final results are usually close to these values, but can sometimes be +/- as much as a pound or more. If you need an instrument to be within a specific weight range, we will do what we can to accommodate you.