Blue Safety Fuse is great for timing 500 gram cakes together. This fuse is just the right speed to keep your show going when connecting these bigger cakes!

Be sure to keep it in the bag until ready for use and wrap it with tape or foil once you fuse up your fireworks, as burn speed will be drastically affected by any moisture.
Diameter: 3mm
Burn rate: 16-20 seconds/foot
Length: 20 feet