ARBO TAG - THE ONLY IDENTIFICATION SYSTEM FOR STREET AND PARK TREES THAT GROWS WITH THE TREES More and more municipal and private tree owners systematically collect their tree stock data. This serves to simplify the administration of tree stocks, identification of trees during tree control and upkeep measures as well as the creation of tree inventory plans. The patented Arbo tag system is the only tree numbering system that expands as the trunk grows. Our Arbo tags are comparatively inexpensive. Coloured black or white, numbered consecutively or provided with an individual text, they guarantee you with secure monitoring of the urban tree inventory.