Semroc Centering Rings FiberST-5 to ST-10(2 ring set with engine hook slot) SEM-CR-510EH
Laser-cut fiber rings which center an ST-5 motor tube inside an ST-10 series tube
Especially useful for making a mini engine mount for ST-10 rocket bodies
Thickness is 0.05"
I.D = 0.541
O.D = 1