From the product description, check product page for current description, price and availability:

Perfect heating solution for those who want even coverage and certainty that their PET fermenter will not melt even if the fermenter is empty. Features Velcro straps to hold the blanket firmly in place. Ultra low density 30 watt element is spread out along the entire length and width of the heating belt, preventing hot spots and providing even low density heat.

Using 30 watts, this heating wrap belt is great when paired with insulation and a thermostat like our item P40 RAPT Temperature Controller or item Q91 KegLand MKII Dual Plug Control. Plugs into any 110 volt outlet. Fits all KegLand Fermzilla models, as well as carboys and plastic bucket style fermenters.

39″ long, 9¾” tall.