Fire always has a mystifying and exciting appeal on the audience. Imagine this: You show a beautiful box like a "Jap Box" with ultra thin walls. The audience can see right through it: it's empty.
Then you push a silk through the two holes at each end of the box. the audience can see both ends of the silk all the time, and inside the box as well.
SUDDENLY BIG FLAMES COME OUT FROM THE BOX AND YOU PULL THE SILK BACK AND FORTH THROUGH THE FIRE!!!
When the fire stops, you show that the silk still is undamaged inside the box.
The fire starts again and you repeat the effect, only to show the silk undamaged at the end.
This is an effect the audience will long remember. The box is made of metal and wood covered with black velour to protect you from heat. It looks very good.
The size of the box is 140mm x 80mm x 80mm. It's easy to handle and easy to ignite thanks to a built in flint wheel.