Semroc Centering Rings Plywood BTH-52(LT-115)(29mm Motor Tube) to T-4.0"(2pk) RA-52H-4.0"Ply
Lite Plywood Material 3 Ply
2 pack
ID= 1.216 For BTH-52(LT-115) Motor Tube(29mm Motor Tube)
OD= 3.904 for 4" Estes Pro Tube
Thickness= 0.125"
Made in the USA