SMC KJR01-07 PBT Push-To-Connect Tube Fitting, Plug-in Reducing Coupler, 1/8" Tube OD x 1/4" Tube OD Plug-in reducing coupler for connecting two pipes with different diameters Push-to-connect fitting connects to pipes or tubing on both ends Made of polybutylene terephthalate (PBT) for resistance to solvents, shrinkage, heat, and impact Working pressure of up to 150 psi Operating temperature ranges from -5 to 60 degrees C