Where to get flexwatt

[Stewart_Reptiles]

Where can I get flexwatt? Do they sell it in stores? I am going out today to buy melamine boards to build a rack and just need to know what size flexwatt I should get. Any info will help out!

Size will depends on various factors, I use the 4" flexwatt heat tape with my melamine racks.

http://www.reptilebasics.com/flexwatt-heat-tape/