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