Used in combination with a straight length, this component assures that an exact required vent length can be achieved

Allows for easy disassembly and can absorb the linear expansion of longer pipe lengths

12" length adjusts from 3-1/2" to 10-1/2", 18" length adjusts from 6" to 16"

Size refers to the inside diameter of the pipe or fitting

The outside diameter of RV is approximately 1/2" larger

Type B gas vent