Genuine Meyer OEM 1 Piece Crossover Valve Assembly 15974 - Fits E-47/57/60/68/88 units. This is all Meyer offers now for the E-47, 57, and 60. It replaced the multiple piece adjustable 15606 Crossover Relief Valve. Fits E-47/57/60/68/88 units. It might be in clamshell packaging (as pictured), or might be in a zip lock bag. We have complete new E-68 PA Blocks that we part out, so that is why it may be in a bag. Installed on an E-47, 57, or 60 PA Block it will not screw "all" the way in, this is normal. It seals on the inside, not via the threads. Pipe dope on the THREADS ONLY is a good idea. NOT Teflon, dope.