Insulation Highland barley paper 18650 21700 lithium battery hollow insulating paper gasket high temperature motor green shell paper Product Overview Our Insulation Highland Barley Paper is made laminating a polyester film to one layer of insulation paper. The product can be supplied cut in rolls, sheets or die-cut pieces according to customer specs. ideal for 18650/21700 lithium batteries as hollow insulating gaskets. Also fits high-temperature motors. Features green