The Dunlop Fort All Court tennis balls are ideal for players seeking a combination of optimal playability and consistent bounce. These iconic tournament balls are highly popular in UK tennis clubs and feature HD Core technology delivering great performance on all court surfaces and enhanced durability. They are approved by the International Tennis Federation (ITF) and provide increased visibility thanks to premium Fluoro woven cloth. The balls come in a 12-dozen pack (36 x 4-ball tube).