Cantilever Arms Are The Heart Of The Rack System. Proper Selection Can Make Or Break A Successful Storage Plan. Cantilever Arms Come In Either Straight Arms (Generally Used For Storing Stable Loads Such As Lumber, Steel Sheets, Cartons And Skids) And Inclined Arms (For Cylindrical Objects Or Loads That Tend To Roll Forward). Arms Can Be Adjusted On 3" Centers Up And Down The Upright And Are Available In Lengths To 60" In A Variety Of Capacities. The Hair Pin Keeper Permits Instant Adjustability And Is Easily Inserted And Removed For Adjustment Of Arm Height. Inclined Arms Have A Pitch Of 20 Or Approximately 4.36" Per Foot. Standard Arm Color Is Gray. Made In The Usa.