EZ-Strainers™ are great for keeping unwanted particles out, or straining contaminants out of your products. Made of high molecular weight high density polyethylene. 5 gallon are 25 mil thick, 55 gallon are 28 mil thick. They come with a center mesh in ultra fine, fine, medium, or coarse for use with a wide variety of products. 55 gallon are made for metal drums but will fit a plastic drum with an ID of 22". 5 gallon will fit both metal and plastic pails.