The X-904 is the safest, most trusted personnel transfer device on the market. The top frame protects the passenger from falling objects. The core of the red vertical ropes are comprised of stainless steel cables. The outer ring of ropes and protects the passenger from any objects that may strike from the side.
Send your X-904 to Alexander/Ryan every two years for a total refurb and an updated certificate. See the document for the list of parts replaced on the X-904.