A KitchenAid by Hobart copper bowl insert liner for their 5 quart lift a bowl models K-5, K-5A, K-5SS with a copy of it's information cleaning and use. The size is 8 5/16" dia. out side rim lip across and 6 7/8" high and fits inside of the mixer bowl, we have another one just like this that fits our Hobart N-50 also.
eBay