"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, Rail Height in. 30, Top Step Height in. 70, Dimensions W x D x H in. 30 x 53 x 100, Caster Size in. 4, Material Type 1 in. O.D. steel tubing, Top Width in. 26, Base Size W x D in. 30 x 53, Finish Type Gray, Caster Type Safe lock, Step Type Expanded metal, Steps qty. 7, OSHA Approved Yes California, Capacity lbs. 450. Built-in CAL OSHA rail kit"