Wool felt /needle felt/needle punched felt: 1.against dust, sealing, sound insulation, thermal insulation ( A) Industrial Felt: including 112 type, 122, 132 type, 332 types ... wool fiber. (E) felt workpiece: Felt pad (felt seal), felt ring, felt articles, felt tube, felt wheel, felt rope, felt belt, felt shaped products. (F) Entertainment Felt: Felt painting, piano with felt, eraser with felt ...