Roll & Fold Steel Rolling Ladders• Mobile ladder can be folded for space-saving storage or transporting• Ideal for use on asphalt or similar rough surfaces • 1-1/16" tubular steel construction • 16" W x 10" D top step with 16" W x 7" D intermediate steps• Two 10" diameter semi-pneumatic wheels on rear of ladder, reinforced rubber tips on front legs to secure ladder during use • Capacity: 450 lbs.• Shipped knocked down • Grey powder coat finish• Complies with OSHA and ANSI standardsAvailable in 3 to 12 steps in Perforated Step or Grip Step Tread