This is Rigging Thread for rigging sails on Constrcto Boats will also work on any static display sailing vessels that require rigging thread.This is Rigging Thread for rigging sails on Constrcto Boats will also work on any static display sailing vessels that require rigging thread. FEATURES: Spool of Woven Thread INCLUDES: One Spool of Thread SPECS: Color: Bright Thread (light tan) Thread Diameter: .75mm (15 MT) JCT 9/3/04