Note: Picture shown is the 14" bag. This bag is 4" ring and 8" long. Premium Aquatics 200 Micron Felt Filter Sock Bag - 4” x 8” with Plastic Ring MADE in the U.S.A Standard Felt Liquid Filter Bags • Micron rating of 200 • Broad chemical compatibility • High flow/low pressure drop • Sewn construction • plastic flange • Temperature ratings to 275ºF (Polyester) Felt Bag Materials • Constructed using 100% synthetic fibers in polyester. • The proper combination of fiber diameters, weights and thicknesses result in an economical depth filter media. • To reduce fiber migration, Polyester bags are singed. • Silicone-free construction • High dirt holding capacity • Ability to remove both solid and gelatinous particles • Glazed/singed finish on Polyester reduces fiber-shedding Felt Bag Styles • Plastic flange bags have a specially-designed flange sewn to the top of the bag and are supplied with sewn seams standard.