unfortunatly not usb nacked on comp i dont think i can describe it any better all of the retrictor fits inside of the compressor flange it is a genuine group a restrictor as it has 909 stamped on it if that is any help.the main concern is as i say the fixed flange does not go thinner at the top edge for fitting the hose if the restrictor is removed.it looks as if (even though it hasnt)that the flange has been cut down ie the thinner part fore the hose fitting has been cut off.