... solution 3. Competitive prices 4. Excellent customer service Aluminum Extension Ladder 24 ft. Shanghai Yi Jing Mold Factory Our ... Iron, carbon steel, stainless steel, brass, copper, alloy steel, aluminum, cold rolled steel, hot rolled steel, etc.Surface Treatment ... , injection molding. Usage of products: 24 ft. Aluminum Extension Ladder features heavy-duty spring loaded locks for smooth operation. ...