Aluminum Extension Ladder. 200 LB DUTY RATING. 24 Feet. D-shaped Rungs. Mar resistant rail end caps. Slip resistant rubber feet. Aluminum rung lock. Meets or exceeds the safety standards set by ANSI (American National Standards Institute) and OSHA (Occupational Safety and Health Administration). Tempered, serrated aluminum D-shaped rungs provide for a slip-resistant surface. Impact resistant caps on all rail ends provide rail protection for longer life and protect work surfaces from marring. Meets or exceeds the safety standards set by ANSI and OSHA. Dimensions: .95 rail depth, 14-1/10 base inside, 13.312 fly inside, 16 base outside and 15.212 fly outside. L-2324-16 does not include rope and pulley. Length 24.