For colubrids, one piece of the 4-inch Flexwatt is fine or else a 1ft section of the 11-inch wide Flexwatt. Consider that these snakes only need to heat part of their body usually, and even if they want to heat all of their body, even a large kingsnake can mostly fit over those pieces.

I like the 11-inch piece in the center because you can raise the box up with felt pads on the corners and just clear the Flexwatt. So no routing of a groove is necessary.

For larger boas,pythons you will need to increase the heated area accordingly, or heat the room and then use the above pieces only.
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Mark

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• IRIS tub rack heating size selection - Omnivorous, Wed Feb 25 00:15:05 2009
• RE: IRIS tub rack heating size selection - bsharrah, Wed Feb 25 06:31:07 2009
• RE: IRIS tub rack heating size selection - markg, Wed Feb 25 14:45:05 2009
• RE: IRIS tub rack heating size selection - Omnivorous, Sat Feb 28 07:15:40 2009
• RE: IRIS tub rack heating size selection - gaboonx, Sat Feb 28 09:59:41 2009