2.5" x 29mm Birch plywood model rocket centering rings

2.5" x 29mm Birch plywood model rocket centering rings 
3 rings, no notches. 
Fits Estes PSll 2.5" body tubes 
If you want more than three , just message me. 
If you need 4 or 400 arrangements can me made.
If you purchase just this one set of rings you will receive a partial shipping refund.