Excellent product from Worker. But what's best is that Out of Darts brings it and many other products from overseas and distributes in the USA. They have fantastic customer service and the owner Luke regularly answers questions personally. This store is A+!!!
Worker Prophecy A Plunger Tube (Larger air volume)
Description states that it "can be used for Retaliator with some extra work". I don't know how much extra work that's referring to, but I had a devil of a time with it. Gave it a good solid go and chewed up a good Retaliator shell in the process.
I also have one of these in a Prophecy shell. It took a little finagling to get it to fit. (Phrasing.) Works like a dream, no issues.