"Cotterman rolling ladder features large casters and Safe-Lock security. Steps and platforms are made of slip-resistant, expanded metal. Durable gray enamel finish. Constructed with 1in. O.D. steel tubing to meet or exceed all OSHA and ANSI standards. This unit includes CAL OSHA rail kit required for California orders. Step Depth in. 7, Step Type Expanded metal, Caster Type Safe lock, Rail Height in. 30, Finish Type Gray, Caster Size in. 4, Material Type 1 in. O.D. steel tubing, OSHA Approved Yes California, Capacity lbs. 450, Steps qty. 6, Top Step Height in. 60, Top Width in. 26, Base Size W x D in. 30 x 46, Dimensions W x D x H in. 30 x 46 x 90. Handrails"