Looking for the best of both worlds? Why not try the Supreme Dual Powerhouse. This system offers play activities galore. You have dual 6.5 ft deck heights, crawl tunnel, dual 13 ft slides, and rockwalls for more fun. Swing as high as you can with the 9.5 ft swing beam height, and touch the sky. Looking for the best of both worlds? Why not try […] Looking for the best of both worlds? Why not try the Supreme Dual Powerhouse. This system offers play activities galore.  You have dual 6.5 ft deck heights, crawl tunnel, dual 13 ft slides, and rockwalls for more fun. Swing as high as you can with the 9.5 ft swing beam height, and touch the sky.