Kontek manufactures the only stand-alone, Department of State-tested and -rated K8-L2 and K4-L1 vehicle barriers. The company has successfully full-scale tested DOS K4 & K8 crash barriers. K4 (15,000 lb vehicle at 30 mph). K8 (15,000 lb vehicle at 40 mph, actual recorded impact 44.6 mph). Kontek has also full scale crash tested barriers to stop a 20,000lb vehicle at 50 mph and has a barrier system that will stop a 65,000lb vehicle at 50 mph. Kontek's Massive Modular Blast Barriers (MMBs) are designed to deliver a massive, virtually indestructible, physical security barrier capability. The MMBs were designed to resist bulk high explosive and linear threat weapons. The interlocking massive concrete blocks can be stacked in the field for enhanced security. The modular aspect allows for various barrier height and width and permits relocation as required. MMBs can be stored, shipped and deployed when and where needed. Kontek's Massive Modular Blast Barriers (MMBs) are designed to deliver a massive, virtually indestructible, physical security barrier capability. The MMBs were designed to resist bulk high explosive and linear threat weapons. The interlocking massive concrete blocks can be stacked in the field for enhanced security. The modular aspect allows for various barrier height and width and permits relocation as required. MMBs can be stored, shipped and deployed when and where needed. For more information on our planter barriers, please call us at 573-748-5561 or request a quote.