If they are teague chokes and the threads have been properly cleaned/lubed you can probably remove them by simply sticking your finger down the UNLOADED bore and turning to take them out.
If Teague thinwalls; you can order additionl replacements from him by simply referencing the serial numbers.
The constriction will be marked on the outside of the tube walls when you get them out as will the seria numbers.
Teague custom thinwall chokes used to cost about $250 to have installed with 6 tubes and a wrench supplied. The replacemnt tubes used to cost about$45. I am certan that the price has gone up.
They are exceptional products and tend to throw beautiful consistent patterns.
a "typical" perazzi will have tight (ie 18.4MM" euro spec barrels so the actual choke constriction will be more open than you suspect.
If the barrel profiles are on the lighter side (most perazzi barrels can be semi-custom ordered by weight/length and rib options) you may find that the gun actually weighs a lb or so more than what it feels like.
I have one that feels like it weighs less than 7lbs but tips the scale at 8lbs and is a pure joy to shoot.
