1kg charge

1kg explosive charge. The originals would be made of zinc and have waterproof stickers over the holes to allow them to be used underwater. The box is hollow to allow sand to be poured inside to give a more realistic weight.

It is recommended to use super glue to secure the fuse wells to the box.

The lid has a tight fit to prevent it from falling off and spilling sand. Will likely not need any glue to hold together.