This insert is designed for the Pro V-2 bag whose interior is 19.5 x 9.75 x 9.25 . The Domke F-1X's interior is 17 x 6.7 x 9.0 . Some components may work but I doubt all. The Domke FA-240 4-Compartment Insert B&H # DOFA240 is listed for being use with the F1-X. However, the B&H customer reviews on this insert are mixed.