Features:
1) The first chair
A) Normal ascent/descent: 44-58cm
B) Heightened type: 44-85cm
C) Filter hole
D) Air leg
E) Chrome plated aluminum five-star leg
F) Aluminum wheel without any damage to floor, used for clean room
2) The second chair
A) Ascent/decent: 44-58cm
B) Air leg travel: 140mm, 280mm travel available
C) Filter hole
D) Air leg
E) Chrome plated aluminum five-star leg
F) Nylon and metal accessories for fixing leg
G) Solid, durable, used for clean room