These plastic tapes make it easier for students to learn fingering positions. This neat, durable tape can be easily and accurately placed on the fingerboard of any string instrument. This color tape is more for younger students who need high visibility to learn positions. Be careful what you put on your precious instrument. This tape is acid free and will not harm the surface of your instrument. A package of color tape contains 3 roles (one each of red, blue and yellow) which are 1/8" wide. The TOTAL combined length is 130", enough for as many as 15 uses, and can be used on violin, viola, cello, and bass.