https://www.industrialmanlifts.com/product/135-145in-dual-track-ladder-wbrake-7411a6-b-c1-p3-kit/
135 to 145in Dual Track Ladder w/Brake - 7411A6-B C1 P3 KIT - Industrial Man Lifts
Top Step Height 110 In., Step Tread Perforated, Step Width 18 In., Step Depth 5 In., Material Steel, Max. Work Height 15 ft. 2 In.