Use for concentric horizontal terminations. Includes 2 appliance adapters, white wall plate, white firestop and co-linear adapter. White Termination with Bird Guard Screen. UV resistant. Inner plate is 8-5/8 in. (220 mm) square, outer plate is 9-7/16 in. (240 mm) square for all flue sizes. Includes 2 Locking Clamps and 2 Adapter Connector clamps. Adapters included to transition from PVC appliance outlet to twin pipe PolyPro. PolyPro is an engineered alternative for condensing gas appliances. Engineered for venting, it is easier and faster to install than PVC, saving the contractor time and money. Polypropylene has a higher operating temperature limit of 230°F/110°C (PVC is 149°F/65°C maximum and CPVC is 194°F/90°C). PolyPro is engineered with a condensation management system.