The Bolin Chest Seal advances care for sucking chest wounds. The BCS is a sterile occlusive chest wound dressing for treating open pneumothorax and preventing tension pneumothorax that result from gunshots, stabwounds, or other penetrating chest trauma. NSN 6510-01-549-0939
The TK-4L updates the TK-4 design by putting a tension fixture at one end of the strap. The added aluminum tension fixture results in the ability to apply maximum manual force to the strap and increase the blood loss stoppage capability of the strap