Briley Sub-Gauge Tube Chokes

I have 4 flush chokes for each gauge (12 total). 20, 28, .410 chokes are in the following constrictions: SK, IC, LM, M

Here is the following tube info that is required to know if these will work with your tubes. 

20 ga series 3T bore .617

28 ga series 51 bore .549

410 series 52 bore .420

The LM and M in all gauges are new never been used. SK and the IC have been used. I have switched over to extended chokes so these are just sitting here. $625 shipped. Will not sell individual chokes.