Hassembly c/o 2 ea tube,vertical seat support p/n 11594892-1,2 ea tube,vertical seat support p/n 11594892-2,1 ea channel,horizontal seat support p/n 11594892-3,1 ea channel,horizontal seat support p/n 11594892-4,2 ea stop,seat back p/n 11594892-5,channel and stop matl aluminum,fed spec qq-a-200/7,alloy 5456 h111,surface treatment chemical mil spec mil-c-5441,prime mil spec mil-p-8585,enamel olive drab fed spec tt-e-529,88.760 in. O/a lg,18.000 in. O/a h