Basec BAS-MC02 219mm Full Automatic Hydraulic Rising BollardHydraulic Rising Bollard 219mm Automatic Integrated System The 219mm Hydraulic Rising Bollard is a heavy duty, high security barrier engineered for superior vehicle restraint and access control in high risk environments. This fully automatic, hydraulically integrated system deploys vertically to create an unyielding perimeter defense, ideal for protecting critical infrastructure, commercial entrances, and sensitive areas from unauthorized or hostile