Louisville® Step Ladder, Type IA Non-Conductive Weather Resistant, series: FS1500, 4 ft Ladder Height, 300 lb, ANSI Code: A14.5, Fiberglass, 3 Steps, 28-5/16 in Base Spread, 19-9/16 in Bottom Width. Louisville® FS1504 FS1500 Type IA Ribbed Step Ladder, 4 ft H Ladder, 300 lb Load, 3 Steps, A14.5