By 20 units - 20 mm long - 2.4 mm in diameter.
The plastic tube, closed in a sealed manner, contains two chemical compounds separated by an easy-to-break glass light bulb. The torsion of the plastic tube causes the bulb breaking thus causing the mixture of the two products with the production of a fluorescence light. This glow decreases at low temperatures, it is more intense with heat. It can last 8 hours.
The products are neither toxic nor flammable. Their storage duration before use varies from two to five years.
Given its small diameter, this tube can be inserted, like a raging, in a soft lures translucent to make it bright even at great depth. It can also be glued on a hard lure at the cyano glue.