Jaybird and Mais 4500 Jaylastic Lightweight Athletic Stretch Tape: 2 in. x 7-1/2 yds. (Black) Core: 1" diameterBacking/Carrier: dyed cotton/polyester blended fabric clothAdhesive: 100% latex-free synthetic rubberThickness: 17 mils (carrier, adhesive)Adhesion: 20 ounces per inch (to stainless steel test panel) Jaybird & Mais 4500 Jaylastic Lightweight Athletic Stretch Tape is Jaybird's original lightweight, hand-tearable long stretch tape. Application uses include those where you want to create support, but where you also want to achieve a greater range of motion. 4500 Jaylastic in un-bleached white can also be used in conjunction with a white rigid non-elastic tape for a taping applications with memory characteristics. The black rolls are dyed and have a 100% latex-free black synthetic rubber adhesive and are designed for black