Henry, everyone here should buy some simple single material serving. It has so many uses. When my serving wants to separate I put a serving or two between the wraps so take up the space that would other wise expose the string material. Makes the serving last longer. Some times from brand new you can separate the serving with your finger nails and so I just put a serving in and it lasts longer. It is also a much better way to put cat whiskers on(they will be more affective and stay on longer).