PMMA acrylic tube for sealing and protecting a safety light guard with a length of 15 cm of the series "PSEN op.../1".The IP protection class is increased from IP65 to IP67, IP68 and IP69K. TheGore-Tex membrane at the caps prevents the intrusion of dirt and water and internal condensation. The connection cable of the light guard is run through an M16 PG cable screw connection and it prevents the