Marshall Excelsior Excess Flow MPOL x 1/4" FIF x FPOL x 1"-20 MNPT Brass Tee LP Adapter Fitting ME420P 06-0245

It measures male POL (prest-o-lite) inlet x 1/4 inch female inverted flare auxiliary inlet with check valve x female POL outlet x 1 inch-20 MNPT outlet. It includes plastic handwheel and has a flow rate of 0.9 gallon per minute.