A new type of film rolling device, suitable for the height that people can not reach or the top of the film rolling, self-locking setting, in use can achieve any position of opening and closing. Specification: Material: Aluminum & Steel Winding length: ≤ 120m Coiling height: ≤ 2m Specific rolling speed: 1:4 Size:23*17*15cm Shed galvanized pipe size: 1 / 2 ", 3 / 4" Application: used for rolling film on the side or top of the shed to ensure ventilation in the shed. Features: 1.The self-locking structure can automatically stay at any position of the roll film without slipping. 2.Roll film is stable. 3.Durable,Long service life. Package Included: 1×Rolling Blinds Machine Note: Roll up clockwise.