Low profile, interlocking airport barricade. Fill with up to 220 lbs. (26 gallons) of water. Each barricade has two fill holes and one drain hole. The Lo-Pro features two flag mounts recessed areas at the bottom for forklift access and accepts both standard bolt on barricacde lights as well as 360° round screw on airport lights. FAA Advisory Circular No. FAA AC150/5370-2G compliant.