This is a complete heated bed consisting of an aluminium print surface and Katon heater with a thermistor all mounted and wired.
This is the newer generation of heated bed technology.
I have found that they work very well and is an great energy efficient heater.
The Kapton size is 200 x 200 mm and uses adhesive tape to be stuck to the underside of the flat print area.
It is ideal for aluminium printer beds.
It can be operated from 12 Volt.