AC+connection+vent 150/5.9

I needed a adapter to my AC-unit that suited my needs so i made one. Since i live on the ground floor i needed something to block the outlet of the AC and was compatible with the plywood i use to block the window itself. Its mounted with 4 bolt and nuts. It fits various types of bolt/nuts other then the type in the picture. I chose these cuz they cant be unscrewed from the outside. Please leave a rating or send me a DM for any questions.