Many of the vacuum lines measured at 5mm.
The Mazdatrix vacuum lines are 3.5mm and 6mm.
The closest to 3.5mm I can find are 1/8" caps.
Which material is best:
Black Rubber
Vinly
Silicon Rubber
Or, am I looking at marketing labling.

(I still don't know enough to reach noob level.)

 

Silicon Rubber - it won't dry out. I use Vibrant silicon hoses on my rats nest.

 

Thanks for the very quick reply.
Items orderd.