Material Main Body: 304 - Stainless Steel Arm: Aluminum (Can be shortened upon request.) Rotor System Turnstile passage barrier is provided by 90° controlled one-way opening arm. Motion Control is powered by thrust. It is opened by pushing it by hand, transition is provided, and the arm is closed by coming back to its place thanks to the spring system. Protection All parts inside the turnstile are made of corrosion-resistant products. Middle Plate Optionally, the middle plate inside the arm can be closed with materials such as glass, plexiglass, decota, etc.