Adrenalins LPR Nipple. Used with an LPR to supply the solenoid with the regulated amount of air the LPR is allowing through. Many colors to choose from. Works on any Impulse. Choose from many different colors.
The Adrenalin Products Impulse Tapeworm/LPR Nipple is older, so while it may be available used and in a few cases new, it is not commonly available anymore.