"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. Steps qty. 7, Rail Height in. 30, Step Depth in. 7, Step Type Expanded metal, OSHA Approved Yes, Caster Type Safe lock, Top Width in. 26, Material Type 1 in. O.D. steel tubing, Dimensions W x D x H in. 30 x 53 x 100, Top Step Height in. 70, Capacity lbs. 450, Base Size W x D in. 30 x 53, Finish Type Gray, Caster Size in. 4. California residents need to order item #1439261"