This is a brand new NOS female 1/8 NPT x male 1/16 inch NPT adapter / reducer to either attach a fuel pressure switch or tap into your fuel rail to supply fuel to the fuel solenoid with your EFI nitrous wet kit. $3 shipping via USPS First Class.   See my other auction items for more good deals on nitrous and hot rod parts-------------you may also call the shop at 702-596-2616 with questions.