AIS Removal kit... Ideas??? Airbox outlet ID???

Well guys I've been dragging my backside making the AIS block off plate . One of the local boys here hit me up to make one
so I flashed out a few quick ones. Not the prettiest laser cutting job but they work fine. Cut them from 3.0 mm stainless steel. I can also make a rubber plug for the airbox outlet but need to know the size? Can someone measure it for me and let me know the ID of the AIS
feed pipe off the airbox? Will give you the set for free..lol..

Here's a few pics...

https://i.servimg.com/u/f35/13/64/97/71/bp113.jpg

https://i.servimg.com/u/f35/13/64/97/71/bp2110.jpg

Hot off the press but I will clean them up and post a new pic..

.500 OD.
wall was around .060

couldn't get a true ID measurement