Seat Swivel Base Heavy Duty Adjustable Rotating Seat Base with Sliding Track for RV Commercial Vehicle Engineering Vehicles Item Type: Seat Swivel Base with Sliding Track Material: Stainless steel + carbon steel + hot rolled steelSwivel Angle: 0 to 360 degrees, forward or reverse available Seat Fixing Hole Distance: Approx. 220mm/8.7in, 275mm/10.8in, 310mm/12.2in, 325mm/12.8in (or re punched) Swivel Direction: Handle control, slides backwards and forwards 80mm (approx. the width of a fist) Application: The swivel is a universal product for the conversion of seat bases, allowing the original fixed seat to be converted into a swivel seat. Installation: The seat is too large and needs to be re installed with a transition plate, if the seat is too small it needs to be re drilled, the application of the base depends on the size of your seatFitment: For most RV commercial vehicle engineering vehicles all kinds of large vehicle seat modification