Today one of our most popular products we sell is our Easy Ship Two Piece Aluminum Triangle Gable Vent. The perfect option if your triangle gable vents is to large to ship with standard shipping. Really saves on shipping! These triangle gable vents are easy to install and make a stronger overall triangle gable vent because the center mullion provides a brace to strengthen the louvers. Installation is so simple! Just install the left side half triangle and then the right side half triangle on the wall or in the opening and slide the center mullion in the track and attach with the provided screws.