I bought an Old Kettle at an estate sale today. ]It is 18 in, uses the exact same grill as my WSM. It has a lid that the sides go up steeper and round off to a more flat top. It has 3 vents on the bottom with 3 holes each. It also has an 8 inch ring with holes and mounts for a rotisserie. I also bought a rotisserie that doesnt quite fit, still new in the box dated 1984. The Kettle is little used and lacks on only the rubber tires to go on the plastic wheels. Cost me $10