3mm Pink Fast Hobby Fuse Due to high demand and limited supply, this fast-burning fuse (1–2 seconds per foot) can be hard to source. It’s ideal for linking firework artillery and canister shells to achieve precise launch timing, or for chaining together a fireworks finale board. Diameter: 3mm Burn Rate: 1-2 Sec Per Foot 1 Quantity= 20 feet All Fuse, Chemicals, and Novelty Fireworks must / will ship by ground only.