Short kraft cardboard and phenolic cardboard coupler tubes to join rocket body tubes of same diameters, and coupler/bulkhead assemblies to make detachable body sections.
Coupler for T-35 body tubes
Pack of cardboard couplers to join Estes BT5, BT20 and BT50 body tubes.
Coupler for T-26 body tubes
Coupler for Klima T-75 body tubes