All 304 stainless low watt density heating element (~110W/square inch) with stainless rods and plug. Plug has 1"NPSM thread.
1500W is 7" and 2000W is 8" from plug face to tip of heater.
These elements are final sale (no returns) and recommended for heating water only. We have switched to heaters with ceramic heads (instead of plastic) but otherwise they are the same 100% stainless heaters as what we have used in the past. These are made in the USA and they may have some food-grade machine oil on them and be slightly dusty.
If you are purchasing more than 10 let us know and we will include a few for free.