Brand Name: Werner *Height: 20 ft. *Material: Aluminum *Product Type: Extension Ladder *ANSI Ladder Rating: Type II *Capacity: 225 lb. *Weather Resistant: No *Rung or Step Depth: 1.75 in. *Number of Steps: 20 *Base Spread: 17.3 in. *ANSI Certified: Yes *Step Rise: 12 in. *Nonslip Tread: Yes *Ladder Material: Aluminum *Twin Steps: Yes *OSHA Compliant: Yes *Weight Capacity: 225 lb. *Minimum Ladder Height: 10 ft. *CSA Listed: Yes *Maximum Ladder Height: 17 ft. *Maximum Working Length 17' *Medium duty/ commercial use *Yellow end caps and rail closures *Modified I-beam side rails *Traction-Tred serrated  aluminum 1-1/4" flat rungs *Extruded aluminum double rung *Discovery SUP