38 (ID)/45(OD) mm or 1 1/2" Vacuum Hose repair connector. STEP included

just screw the two hose segment half way in until they meet. If crewed in tightly, it has sufficient fricton to not come lose and seals descent.

I use it to join two parts of one hose where I removed a damaged section, could also be used to join srgments for modular hose system.

Print with any material, no support needed. Step file included if you need to make adaptations for your specific hose.