350 X 350mm (Approx. 14" X 14") 110V 800W, w/Digital Controller + Plug + Grounding Wire KEENOVO Universal Flexible Silicone Heater Cobblebot Huge Cube 3D Printer Heated Bed Build Plate Heater Mat/Pad

Complete solution for building an super-sized heated printing bed. Comes with a sheet of concise and accurate instructions, which is a refreshing change from the normal "Here it is: now figure it out.." - you all know exactly what I mean! With this you read the instructions first, then check out the all-one controller/psu to be sure you know how to operate it, and then just slap it on your borosilicate and plug it into 120V - 3m adhesive is already applied, and the thermistor is pre-mounted and wired, so it is ready to go. I bought two of these for a 700mmx350mm bed for the printer I am building, and the build quality was excellent and consistent for both models. Shipping was great: I ordered this Nov 6, and rec'd it via DHL on Nov 17th - even though Amazon's estimate was as far out as January 5th, 2016! Keenovo contacted me with the DHL tracking info and was professional through out. Would not hesitate doing business with them again.

Gets up to temperature very quickly and holds consistently, but doesn't heat the perimeter at all. The heat zone isn't actually 14x14, it's more like 10x10.