I have two Parker Veriflo regulators for sale. They are the IR-401B single stage models in excellent working condition. Each of the regulator comes with a 0-100 psi range pressure gauge. I am just selling the regulators and the pressure gauges and not the needle valve or any other attachments. The attachments that you see on the silver regulator (right one) in the first picture as well as pictures 2 to 3 and the last picture are there for illustrative purposes. I used these regulators with my paintball CO2 tank and that black attachment is used to connect to the tank (see last picture).
Thanks for looking!
Another thing of note is that the configuration between the two models are a little different. The high pressure in port is on the back of the blue regulator while on the silver regulator is on the side (compare the silver regulator in the first picture to the last picture which is that of the blue regulator). Not much of a difference. Also, when I bought the blue regulator, the seller told me the out put range on the regulator is up to 100 psi. For the silver regulator the output is at least 30 psi (don't remember the exact) and both suited my needs for use with those glass diffusers. Lastly the silver regulator has one additional low pressure out port that I never used and it came capped when I bought it.