This SITA brand nylon horse sighter wire is 4mm in dia & 770 meters long.
It has a breaking strength of 620kg & is UV protected.There is no wire in the middle, just pure nylon.
Elongation of about 5-10% can be achieved by using strainers until the line is taut. Only available in white colour.
Please note this horse fencing wire or horse sighter wire is 770meter long unlike other shorter length brands.
Some of the advantages of SITA wire:-
Will not cut into horses like steel wire & is easily recognised by the horse being white.
Chemical: Acid and alkali resistent, anti-ultra violet and free of rust.