Polymer Rubber Roof Flashing for 6/12 To 12/12 Pitch Rinnai"s unique Ubbink concentric venting system provides maximum performance, safety, and ease of installation. Compatible with all indoor Rinnai water heater models, except the 98 series which utilizes separate intake and exhaust venting. Features: GSA Approved 6/12 to 12/12 Pitch (25°-45°) Roof Flashing With Polymer Coating For Long Life Professional Installation Recommended Specifications: Length: 9-13/16" Width: 6" Height: 20-7/16"