For cleaning all grades (from coarse to fine) of wire cloth used in testing sieves, but especially suited for cleaning fine mesh (100 mesh and finer) sieves. Nylon bristles will not damage the wire cloth. Can be used with either stainless steel or brass wire cloth. Bristles are made of black nylon; all other components are wood. Dimensions: 1 3/16" diameter head x 7/8" long with a 3/4" dia. x 4” long dowel handle. Overall length is 6”. Bristles are 1” long.