... 3.Density:0.3g/cm3~0.45g/cm3 Felt polishing wheelMaterial:100%wool felt Thickness:1-20mm Color:White ... Wheels There are soft, medium and hard wool felt wheel, selecting different grade wool felt according to customers' requirement ... mainly used for polishing of stainless steel, jade, marble, precision instruments, medical equipment, glass products, high-grade furniture, etc... Felt polishing wheel