GRP/Al support tube for separate (insulated) installation of air-termination systems with M10 internal thread, can be used for air-termination tip or MV clamp for spanning and for fastening the HVI cable. To maintain the separation distance from electrically conductive parts in accordance with DIN EN 62305-3 (VDE 0185-305-3). Tube D50 mm made of glass-fiber reinforced plastic (GRP), UV-stabilized, color light gray, material factor km = 0.7. One-piece design.