With a co polyester core ensuring a firm feel and thermocore technology enhancing elasticity and flexibility the tecnifibre pro red code wax tennis string is a great choice for players seeking a combination of spin snapback and durability this monofilament string provides less friction and maximum lubrication for easy stringing thanks to polyethylene wax impregnated into the polyester matrix it is an official string of the atp world tour and comes in a 200m 656ft reel