Fernco XJ-150 Expansion Joint, 1-1/2", Black"Fernco" Expansion Joint Expansion Joint Size: 1 1 2" Black Plastic With two stainless steel worm drive clamps Allows for thermal expansion and contraction of drain, waste and vent pipes and inside rain water conductor systems Unique one piece construction, internal stops of positive positioning, no sliding parts to malfunction, no packing to jam, freeze or leak