Highlighter tape..... I Purchased this tape for my daughter as a gift because I had used it previously when taking a class at Knotty Lamb and I love the way it worked. My daughter is a crochet hair and she was thrilled when she received it and the magnetic chart graph notebook. She said it was very helpful. I love using that tape it’s so much easier than changing the magnets around constantly . Wish they would’ve had it years ago! That’s a five star item. Thank you so much Knotty Lamb. Shirley