This is three rolls of galvanised steel stock fencing - they are approximately 50m each in length.  They were purchased in the mid-to-late 1990s, and used from then until about 8 years ago, and have since been kept in a shed all the time.  They are in fairly good condition, with just a bit of surface tarnishing in a few places, mostly on the odd lower strand of wire.  They also probably just need a bit of warming to help with the unrolling.