Light weight 3.16" non-conductive fiberglass side rails. Durable copolymer top and aluminum steps. Non-marring wrap around boot shoes. Heavy duty inside spreaders. Assembled with double braces under the bottom step and solid aluminum rivets throughout. Exceeds requirements for ANSI A14.5 and OSHA standards for Type IA 300 lb. rating. Base width = 20.75". Spread = 42". Highest standing level = 2' 9". Proudly made in the USA.