LEKI Makalu AntiShock Trekking Poles Super strong 18mm/16/mm/14mm HTS 6.5 Series Aluminum shafts Super Lock System - strongest locking system in the world (TUV) Soft Antishock System Aergon COR-TEC grip material. 80% natural ground cork/20% plastic for long term comfort and wear Length: 69-145cm