Laser Interlock Assembly. Laser Safety Curtain Barrier add on accessory for 7, 8 or 9 foot height curtains in Plus Power Black Flex-Guard™ material. Contains a 2-piece set with universal mating Velcro®, proximity interlock switch and wire for easy integration into standard laser curtains. Yellow entrance locater strip on each set. Laser-rated at 250W/cm² for 100 seconds. Certified in accordance with ANSI Z136.1-2007, Z136.7-2008, EN 12254: 2010 and NFPA-701: 2010 TM2; black satin finish.