This 1/8 inch to 1/4 inch detector reciever adapter is for use with 1/4 inch packed columns and fits both the detector and injector outlet (inside of oven). Package of two (injector/detector). Includes the following pieces: 2 Adapter fittings, 1/4 inch column to 1/8 inch fitting (00081257) 2 Stainless Steel Hex Nuts, 1/8 inch (09903453) 2 Stainless Steel Front Ferrules, 1/8 inch (09903454) 2 Stainless Steel Back Ferrules, 1/8 inch (09903455)