Skywalker Sports Modular Jungle Gym with Accessories Although not required by law, all Skywalker Sports products are thoroughly tested for safety and durability, and are found to meet or exceed all standards put forth by the American Society for Testing and Materials (ASTM). Modular design allows you to customize the shape and size of your jungle gym Weather and rust resistant powder-coated steel frame construction Plastic-coated chains for added protection No pinch joint covers protect child's fingers