Brand: Fuel Safe Fuel Cells
This machined aluminum filler neck from Fuel Safe has 1 3/4" x 12 threads to fit the Fuel Safe 1.75" threaded filler cap (formerly Fuel Safe Part No. FC175, not included). Measures approximately 2 1/4" high.
The OD of this neck measures 1.5" below the threads. If your fuel cell bladder has a molded nipple to accept a 1.5" filler neck, you can simply clamp this neck in place.