Superior 30 Degree 12-inch DM Offset and 8-inch DM Return for 8-inch Wood-Burning Chimney 30E-12DMO-8DMR30 Degree 12 inch Superior DM Offset and 8 inch DM Return for 8 inch Wood Burning Chimney 30E 12DMO 8DMR Product Details This is Superior's 30 degree 12 inch DM Offset and 8 inch DM Return, designed for 8 inch Wood Burning Chimneys, identified as 30E 12DMO 8DMR. Ensure efficient venting flexibility for your chimney system with this component. What's Included: 12" DM Offset and 8" DM Return Features: Easy to install 30 degree elbow pipe Converts 12"