The Retro Rocker is manufactured with a heavy-duty 5-inches diameter steel support beam. All other pipe in the Retro Rocker is 1-1/4-inches diameter. There are many colors to choose from for this Retro Rocker spring rider. It is great alternative for those weary of traditional fulcrum seesaws and is appropriate for use in public playgrounds and backyards. The Retro Rocker is both ASTM and CPSC compliant. Meeting these standards ensures the safety of the Retro Rocker under public use, which ultimately ensures the safety of children through the integrity of the product. The heavy-duty steel spring comes as shown in black and includes four J-Bolts for mountings to a concrete footer. Typically, installation should take 1-2 hours over a 2-day period, depending on several conditions.