This head immobilizer can be mounted and separated on the scoop stretcher exactly as the DOUBLE PLUS. The difference between the two head immobilizers is in the system of immobilization because the art. 624 is supplied with the standard side rigid blocks instead of the adjustable ones. Supplied with padded belts for the fixing. It is produced with expanded material at closed cells with an inside aluminium sheet and it is covered by a liquid-proof and bacterial-proof material.