So, my little friend helped me out last week !
Cubby the "zilla" cat ( 2 year old Burmese) , chewed through my mist tubing !!!
I came home to a nice little mess !

Here is what we have to resort to at my house. ( found this in the home depot electrical isle)

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Thought I would share, in case anyone has to protect there tubing and electrical cords.
Yes, he chews electrical cords too!