Extruded aluminium construction (1.1mm thick). Milled V-groove bottom face for accuracy and pipework applications. Ribbed sides, protective end caps and hanging hole. Highly visible, UV-resistant 45°, 90° and 180° vials. Accurate to 1mm/m. Extruded aluminium construction (1.1mm thick). Milled V-groove bottom face for accuracy and pipework applications. Ribbed sides, protective end caps and hanging hole. Highly visible, UV-resistant 45°, 90° and 180° vials. Accurate to 1mm/m.