7075 SERIES aluminum alloy tubes for climbing pole(walking sticks) have good toughness and light weight, there are five steps for this craftsmanship , the first step is heating and extruding , the second is annealing and colding rolling , the third step is still annealing, the fourth step is pulling , for different series , we have different procedure, for 7075, we pulling two times then annealing, the last step is quenching and furnacing , we also have experience workers and high technology, trust us, we never let you down.
