Felt-Ring Seal 100% Wool, For Mechanical, Electrical, Aviation Factory Manufacture Strong Oil-Absorbing & Dust Wool Felt felt-ring seal1.Our company ... guaranteed. 6.About Wool Felt products :1)For mechanical,electrical,aviation 2)Density:0.09-0.8g/cm3 ... ,dustproof,sound-insulation,quakeproof,seal,heat-insulation2)Use:mainly used for a vriety of mechanical equipment,mechanicalproducts. textile,chemical ...