Finally, no more ugly masking tape! And no messy gooey tape like from other companies! We designed these plastic tapes, here in the USA to 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 black color is more for older students and it cannot be easily seen by the audience. Be careful what you put on your precious instrument. This tape is acid free and will not harm the surface of your instrument. Sold 1 roll in a package which is 300" long and 1/8" wide, enough for as many as 75 strips. Can also be used on viola, cello, or upright bass.