Selkirk8" SuperPro Rain Cap Deluxe Stainless

Typical return/restocking costs means that, having ordered an 8" cap for my existing 8" Class-A double wall pipe, I am out $30 and some time to deliver it to a UPS location for return because it clearly fits a 10" pipe.Packaging states 8", so I can only presume they're talking inner-diameter. What a waste.This was delivered promptly, and is in unblemished condition - no problems there! Just doesn't fit an 8" pipe.