"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. Capacity lbs. 450, Caster Size in. 4, Top Width in. 26, Steps qty. 6, Top Step Height in. 60, Dimensions W x D x H in. 30 x 46 x 90, Caster Type Safe lock, OSHA Approved Yes, Material Type 1 in. O.D. steel tubing, Base Size W x D in. 30 x 46, Step Depth in. 7, Rail Height in. 30, Finish Type Gray, Step Type Expanded metal. Handrails California residents need to order item #1439251"