Posted by a reviewer on Amazon

You will have to be either a horrible cutter or complete idiot to waste all of this that comes with your purhase

Posted by a reviewer on Amazon

There are no cons about these hose whatsoever

Posted by a reviewer on Amazon

The largest size is useless for any vacuum applications as the wall is way too thin

Posted by a reviewer on Amazon

There is also no writing or markings which is nice if you want a good finish

Posted by a reviewer on Amazon

The hoses will potentially collapse or balloon out with high pressures because they are semifirm silicone

Posted by a reviewer on Amazon

Im using these for coolant drain lines very low pressure emission lines and overflow lines

Posted by a reviewer on Amazon

I used the larger 12mm id tubing on my main engine manifold vacuum port and brake booster both straight short lengths of about 68 inches each and found that the one hose collapses during vacuum increases of 18 20 inhg which is not good

Posted by a reviewer on Amazon

Then it pops back to normal when the vacuum is removed which would make for a troubleshooting nightmare