The Hends BL474 is a slim, barbless model for dry flies. In the Hends size chart for #10, #12, #14, and #16, its hook diameter falls between those of the BL404 and the BL454.
The listed diameters for the BL474 are 0.57 mm for #10, 0.53 mm for #12, 0.49 mm for #14, and 0.43 mm for #16. These values provide a precise reference for comparing the construction of hooks of the same size.
The selection includes these four sizes, in a Black Nickel finish, in packs of 25 hooks.