20 gauge undertaker choke

[Buford]

Last year I bought a 20 gauge undertaker choke for my 11-87 remington. The package said .572 exit dia. But on the choke itself it says .575 exit dia.. Can anybody tell me which is correct?    Many thanks for any information, buford

[Buford]

I found their web site. It is .575 for the lead choke and 585 for the high density choke.