These are 10 m spools of metallic threads made by Kreinik. They are used to add a touch of glamour to your design and to make certain areas stand out. #8 refers to the thickness of the thread ranging from #1 (finest) to #32 (thickest). #4 (very fine) and #8 (fine) are the most common thicknesses. We do not carry all of the range but if you don’t see the colour number that you are looking for, please use the Contact Us button and we will get endeavour to get it in for you. It usually takes approximately two weeks.