"DESIGNED TO WITHSTAND EXTREME WEATHER CONDITIONS;LIFESPAN 20YEARS; FIXED SITE FOR TRACKING INSTRUMENTATION SYSTEM FOR STONY PROJECT ALASKA RANGE COMPLEX; AN/GSQ-T61; HUMIDITY 30 PERCENTMIN,98 PERCENT MAX; MIL-STD-810 CHEMICAL RESISTANCE;WEIGHT WITHOUT PAYLOAD LESS THAN 7,000 POUNDS"