"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 Type Safe lock, Dimensions W x D x H in. 32 x 58 x 110, Base Size W x D in. 32 x 58, Rail Height in. 30, Step Depth in. 7, Capacity lbs. 450, Caster Size in. 4, Step Type Expanded metal, Material Type 1 in. O.D. steel tubing, Top Width in. 26, Steps qty. 8, Top Step Height in. 80, Finish Type Gray, OSHA Approved Yes California. 8 steps Handrails Safe-lock caster system Built-in CAL OSHA rail kit"