High quality aluminium triple extension ladders manufactured by lyte ladders tested certified to bsen131 makes this ladder ideal for all types of trade work each ladder takes a maximum loading of 150kg which equated to 23 5 stone including user tools rigid extruded box section stiles manufactured from high quality aluminium make this ladder one of the strongest in its classification size 3 42m 8 46m 12 rung model number elt335