Safari SpaceMaker Parts DUAL CYLINDER FLAT FLOOR ROOM EXTENSION – 26.0" STROKE (WITH SYNCHRONIZING CYLINDER) MECHANISMAP21503AP21504 AP21502 KIT(Part Page) CYLINDER ASSEMBLYITEM 1 – RAP20301 (36.0" STROKE) REPLACES AP20301 SYNCHRONIZING CYLINDERITEM 3 – RAP21727 (10.610" STROKE) REPLACES AP21727 HOSE ASSEMBLYITEM 2 – RAP50261 (AP50261)