Adhesive tape, perfect for preventing rugs and carpets from slipping. I tried it, and it's great that the rug and mat no longer move! I've used about half of one roll, so it's been opened. There's about half left, so the length is visually estimated to be 5 meters. Please understand that this item has been handled by a person. - Brand: NITORI - Type: Adhesive - Application: For carpets - Size: 30mm width - Features: Doesn't damage the floor - Quantity: For 2-3 tatami mats Thank you for looking.