Pneuflex's model of SPG 10-08 is union straight reducer - stainless steel push to connect fittings which can connect 10mm O.D tubing to 8mm O.D tubing in the same direction. 10mm with 8mm stainless steel union connector reducer push-in fittings can be installed and removed easily, removing tubing by pressing the release ring and pulling the tube from the fittings.