Mar-resistant molded black end caps and vinyl fly section shoes. Larger, stronger modified "I" beam side rails. Exclusive continuos rope and quick clip eliminates loose ends, knots and tangles. Large, smoothly operating extruded gravity/spring locks with spring activated nylon flipper. Full side rail 1/4" thick guide bracket at top of base, engages full fly rail. Guide brackets at bottom inside fly section for smooth operation and durability. Shu-Lok™ features holds shoes in spur position for penetrating grass, dirt, etc. 16-40' ladders; side rails 3"W, flange 1-1/8"W, D-rungs 1-3/4", base width 18" outside rails. UL Listed and Labeled. Meets OSHA and ANSI Code. FOB Shipping Point.