Gold Medal Models HO buffer plate

Robert kirkham

I'm hoping perhaps someone on the list has purchased some of these Gold Medal Models parts - they look suitable for a tank car I'm modelling. While I could use the HO version, part 3500, the HOn3 part, no. 3501, looks more appropriate. But there are no dimensions on the web site so I am wondering what the width of the opening for the coupler would be on each part. So - by chance - is there anyone one the list that has some of these and is able to advise?

Rob Kirkham
Part 3501