Sta-Rite Pentair Drain Plug, IntelliPro #U78-920P

Does not include the O ring. It does not state this in the description. I asked the question before ordering and someone answered their order did include the o ring. However, after ordering someone else answered that theirs did not. Well I got lucky to be in that second person’s group and mine didn't have it. Must be a toss up, so if you don’t need it, it’s a good price for this.