i need a gear box for my project
1) gear ratio =20:1
2)size= doesn't matter
3)weight= max 5kg
4)should withstand 20nm torque(output side)


if anyone is having please let me know,....or if you could help me to locate it on internet @ good price..

5kg      It would be great to know what type of application this is ?

sir,it's a BIG rc car actually ......do you know any sources of getting gearbox.....

I can make one for you. Would 3D printed parts be strong enough?