1.They are made of the composite material fiberglass reinforced plastic, which is a non-homogenous mix of continuous fiberglass threading and a thermoplastic resin.
2.The fiberglass acts as a reinforcing agent that adds strength without adding much weight. Fiberglass is also chemical, rust and temperature resistant, non-conductive and non-magnetic.
3.Regular colors are customized, available at buyer's request.
4.Unit length per piece could be from several millimeters to more than 30 kilometers at buyer's