Semroc Centering Ring Plywood ST-7 to ST-9 x 0.25"(2pk)(same as TR-9, TS-9, CR-79) SEM-CR-7-9P
Laser Cut 1/4" Plywood Rings for centering an ST-7 motor tube inside an ST-9 tube
ID= 0.759"
OD= 0.950"
Made in the USA
Warranty for 1 year from manufacturer defects