AmeriVent 3EAL Adjustable Gas Vent Elbow, 3 Inch SummerFun They have a flat head

They have a flat head which sits flush on the surface when driven into wood

Color Temperature: 4100

and compacts to a smooth

Dual-fit couplers come with spacers that fit two channel widths helping to ensure a proper fit

AmeriVent 3EAL Adjustable Gas Vent Elbow, 3 Inch SummerFun They have a flat headThe adjustable 90 degree elbow is constructed of four sections for smoother bends and less resistance. The elbow adjusts from 0 to 90 deg easily in order to clear rafters or ceiling joists. Highlights: Length: 8 inch Connection Size: 3 inch Mounting Type: Wall Suitable for type B gas vent Constructed of four sections for smoother bends and less resistance Round shape