Black Beauty classifiers with ultimate UV protection! These Jobe brand quality stainless steel classifiers have rugged black plastic bodies with woven stainless steel screens. They are 12 inches wide at the top and are tapered to fit on the top of a 5 gallon bucket. The overall height is 3 1/2 inches. 4 classifiers have been designed to be nested with an overall height of only 8 1/4 inches (for easy storage). Classification is very important to gold recovery, and these are easy to use. UV protection ensures a long life. Choose screen mesh size from drop down menu.