Special effects Flash String gives a sudden flash of fire when ignited! Many uses in magic performances including card, coin, and ball effects as well as vanishing and appearing canes. Can be used as a simulated fuse if coated with a sparkle chemical! 10 feet of string is included. Handle with care-extremely flammable. Store in a cool, dry place. For professional use. Keep out of reach of children. Shipped wet for safety. Dry before using.