Industrial felts have a density of (grams per cubic centimeter). If the density is too high, the elasticity will be lost. If the density is too low, the wear resistance will be lost. The thickness and thickness of wool also have different effects on its function. The use unit can appropriately select or explain the use according to the application request, so as to avoid affecting the application. At present, various types of felts: special items felt, general felt. The difference is based on the thickness of the hair, the size of the density, and the difference in color; the skill request is differentiated by the presence or absence of force, elongation, and capillary action, and the operating unit can be selected as needed. Industrial felts are called industrial felts. General miscellaneous felts: Most of the materials used are recycled wool. The commodity should be used for cushioning, warmth, heat insulation, etc., and the price is cheap.