Input on one side with 90 degree 1/8 npt 27 female elbow, The output is on the other side and top.Output: 1/8 npt 27 male Input: Built for any marker that was built without an ASA on the front. Spyders without ASA or expansion chamber, Mini cockers, Impulse, etc.... Gauge can be installed to read regulated pressure. Fits on these models plus many more  Spyder Aggressor XT Tippmann Procarbine. OD: 1.00 Length: 4.26 Max input psi: 4500