Blue Craze™“ is a 7/16″ or 11.5mm 24-Strand Polyester Cover, a 16-Strand Polyester Core and a Cabled and Twisted Center Core. An Arborist Line with the Neon Yellow and Bright Red! The “Blue Craze™“ provides you with the ability to increase safety and a good firm construction keeps the line round for high performance, 6,300 lb. breaking strength.