Created a funnel specifically to refill the Royal Wing Deluxe Gazebo Bird Feeder, 10 lb. Capacity bird feeder: https://www.tractorsupply.com/tsc/product/cherry-valley-feeders-deluxe-gazebo-bird-feeder
Dimensions:
Top of funnel opening: 142mm
Hexagonal corner to opposite corner: 79mm
Hexagonal flat to opposite flat: 69mm
Height: 54mm