? Seat Structure 1. The conductor sitting chair can be rotated 170 °, or lock in place 2. Standard black frame 3. conductor sitting chair, 30 lbs (13.6kg) ? Performance requirements 1. On the site, including a removable safety fence, site security with lock 2. Command and sitting chair adjustable backrest for back support 3. The conductor sitting chair seat and pedals with easy-to-use pneumatic height adjustment mechanism 4. The conductor sitting chair 5 legs designed to increase stability, to meet the requirements of the majority of seats seats 5. Command the genealogy frame platen narrow edge design size 4cm, can easily flip