Drum Pail Heater Oil Drum Heater Belt Heating Pad With Spring And Thermostat(US).
4 inch width
fits diameters: 22" to 25". you can go bigger if you add additional springs
length is 70 inch
spring allows it to stretch to 78 inch
fits my 24 inch diameter tank nicely
110V, regular US plug
used but like new. not used much
heats up really fast! works great.