"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. Caster Size in. 4, Step Depth in. 7, Step Type Expanded metal, Steps qty. 6, Top Step Height in. 60, Base Size W x D in. 30 x 46, Caster Type Safe lock, Dimensions W x D x H in. 30 x 46 x 90, Material Type 1 in. O.D. steel tubing, Capacity lbs. 450, Rail Height in. 30, Top Width in. 26, Finish Type Gray, OSHA Approved Yes California. Handrails"