Nasatka Maximum Security Barrier NMSB VI bollards, certified K12/L2, are constructed with superior quality steel and, in addition, are the only barriers that include hot-dipped galvanized steel as a standard feature, extending the durability of the bollard barrier system by a minimum of 15 years. NMSB VI K12 bollards provide multiple operator selections (electric, hydraulic, or manual – two types). Nasatka is the first barrier manufacturer to offer two unique types of automated-hydraulic barrier systems.