Semroc Centering Rings Fiber ST-5 to ST-10(2 piece set with shock cord holes) SEM-CR-510SC
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 .05"
ID= 0.541"
OD= 1.0"