The Little Giant Fiberglass Type 1A features nonconductive fiberglass side rails, so it's perfect for electrical contractors. And thanks to an all-new solid hinge design, the Little Giant Fiberglass Type 1A is the strongest, most technically advanced fiberglass ladder on the market today. The Little Giant Fiberglass Type 1A is made of a patented fiberglass resin. So it's both stronger and lighter than traditional fiberglass ladders. In fact, The Little Giant Fiberglass Type 1A is stress rated for industrial use, with a 300 pound government rating. The Model 17 has a step ladder height of 4 ft. & adjusts up to 7 ft. in 1 ft. increments. The extension height is 9 ft. & adjusts up to 15 ft. in 1 ft. increments. This ladder also stores in 4 ft. 7 in. of space.