need to feed 100mm ducting through the ceiling, need adaptor.

I am going to vent my dryer to the outside, I have 100mm ducting and fitting for dryer, but I need to get the ducting through the gyprock ceiling neatly, does anyone know an adaptor or something where I can cut a hole in the ceiling, then put the adaptor that has spigots for the ducting on each side that I can screw to the ceiling and then connect the ducting to each side so it looks neat?? and not just a piece of ducting shoved through a hole in the ceiling?


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need to feed 100mm ducting through the ceiling, need adaptor.