The National Public Seating EXT-8 Extender Bar Kit raises the height of upper and lower rows to accommodate the 3200 series 1000 series 1100 series and 600 series folding chairs, The total loaded height with this extender bar installed is 88"" H, The EXT-8 Extender Bar Kit fits the National Public Seating model 42 model 42-60 model 84 and model 84-60 folding chair trucks, Extends the height of 84 series and 42 series folding chair trucks, Modifies an existing folding chair dolly to accommodate high back chairs, Total loaded height with the kit is 88"", 5 year manufacturer"s warranty, SKU: NPST065