wool felt performance standards: GB FZ/T25001-92. The wool felt products are made from raw wool. 1.Product:wool felt 2.Material:100% raw wool3.Usage:Coasters4.Density:0.09g/cm3-0.44g/cm3(or as for your requests)5.Thickness:0.5mm-40mm (or as for buyer's requests)6.Color:Red,yellow,pink,blue,purple,green,etc7.MOQ:10000 pieces per color8.Sample:available9.Packing:10pc - 20pc/polybag , 15 - 25 ...