These are very strong and will not come apart stainless steel classifiers, the screen
is molded into the plastic then reinforced with a lower ring to keep screen intact
they are 13.5 across the top then tapered down to 11 to fit easily on the rim of
any size or style of round bucket. They are 3.5 tall and can be nested so several
sizes of material can be screened at one time. A classifier screen is a very critical
part of prospecting. Many people ask which sizes they should start with, we say
its best to start with at least a 4 mesh, 8 mesh, 12 mesh if your just starting.
What is "MESH it means the number of holes in and inch. Example 12 MESH means
12 holes across an inch so there will be a total of 144 holes in a square inch.