Babolat M7 Tennis String is a new, innovative string with a multifilament construction that provides power, comfort and durability. The string is made up of seven 100% polyamide monofilaments and an innovative PA+PU matrix that provides a longer lifespan and a high level of comfort. Get multifliament comfort with improved durability with Babolat M7 String! Players should expect a more crisp response than Babolat;s popular Xcel string line. If you are looking for comfort but more control, M7 is made for you.   Construction: 100% Polyamide Monofilament and PA + PU Matrix   Length: 40'   Gauge: 1.30mm (16G) or 1.25mm (17G)   Color: Natural   Features: -Comprised of 7 monofilaments -Crisp Controlled Multifilament -Soft but responsive feel -Increased durability compared to most multi-filament strings