The ZyMax TX family of badminton strings features a BETA Polymer ZyWeaVE core, encapsulated with a high tenacity BETA Polymer wear surface, and then bonded with a proprietary textured coating. Download a ZyMax 64 & 68 TX Catalogue Page REPULSION POWER: CONTROL: TENSION STABILITY: DURABILITY: REPULSION POWER: CONTROL: TENSION STABILITY: DURABILITY: FEATURES ADVANTAGES SPECIFICATIONS Material Proprietary Polymer ZyWeaVeTM Core Proprietary BETA Polymer Monofilaments Gauge ZyMax 64 TX (0.64 mm) ZyMax 68 TX (0.68 mm) Length  33 ft (10 m) set / 660 ft (200 m) reel Colors Orange, White, Yellow BETA Polymer Technology provides maximum dynamic stiffness and repulsion ZyWeaVeTM core maintains tension Proprietary textured coating adds stiffness and control ZyMax 64 TX: Micro gauge for superior performance ZyMax 68 TX: Tournament gauge with maximum durability Usage: Professional and amateur players For maximum stiffness and control For minimum tension loss and superior durability Stringing tension: ZyMax 64 TX: up to 32 lbs (14.5 kgs) ZyMax 68 TX: up to 40 lbs (18 kgs)