Nutone, 0731B000, Part,Na Genuine NutoneA Parts Meet Rigid Engineering And Test Criteria And Are Equal In Design To Your Original Nutone Unit. Replacement Parts Made By Other Manufacturers Might Not Last As Long As Nutone Parts And Typically Aren't Built To Your Unit's Exact Specifications, Which Could Lead To Problems And/Or Other Part Replacements. It Is Also Important To Note That Using Anything Other Than Genuine Nutone Parts Will Automatically Void The Warranty.
No doubts, that NuTone is one of best producer of this pipe fittings. All of my mates tell me, that I must buy NuTone 0731B000 SWIVEL CAP (CT650). The earlier I buy it, the better it is.