TOPS™ 4-Post Pergola Kit (Home Line)BUILD TODAY EASILY EXPAND TOMORROW The TOPS 4 Post Kit includes everything you need to build a sturdy, modular 4 post pergola foundation no guesswork required. With four Tri Top connectors and four Post Bases, you can create a square or rectangular layout thats ready to grow with your vision. Each Tri Top forms a clean 3 way junction with one vertical post and two horizontal posts, while the Post Bases secure your structure to a deck, patio, or