Bird line materail: PE /PPwith a bright yarn structure:twisted packing:spool size:1mm-6mm Brid twine/lineWe supply various Bird twine used for Anti-bird.materail: PE /PPwith a bright yarnstructure:twistedpacking:spool, coil, reel, etc.color:as per your requestsize:1mm-6mmgood quality, various types and competitive price for your unique needs! bird line