High quality aluminum alloy treated on aluminum tube surface. 1. Trekking Pole with Clamp Mechanism,with anti-shock system,for mountaineers and traveller or outdoorman2. Clamp Mechanism Trekking Pole3. 3 section,material is aluminum alloy 6061 or 7075,with anti-shock system,4. adjustable size from 65cm to 135cm,diameter 12mm/14mm/16mm for metal tube.5. Packing:each pair by PE bag*20pairs/ctn6. ...