Pro Overgrip 30 Pack Overgrip offers responsive feel and reliable grip on your tennis racket 30-pack contains two rolls of 15 overgrips and finishing tape Made of microfiber substrate polyurethane material Overgrips measure 1,100 millimeters long by 27 millimeters wide, with 0.55-millimeter thickness Preferred grip used by top tour players like Roger Federer, Serena Williams, and Justine Henin