Check the listing for details. UST Mamiya Recoil Dart ESX 60 F3 Regular Flex .370 Parallel Tip - New For 2025. Color: Black, Condition: New. Listed at 45.00 USD. THE INDUSTRY'S #1 GRAPHITE IRON SHAFT FEATURING ESX DESIGN TECHNOLOGYThe Recoil® DART ESX takes our exclusive Recoil DART technology to a new level. After years of development, ESX design technology has been integrated with DART technology to increase tip stabilization for maximum shot consistency and improved accuracy.Our exclusive ESX design technology also increases launch and ball flight characteristics. While DART technology optimizes hoop stiffness in the critical areas of the golf shaft.To achieve maximum distance, optimum hoop stiffness is designed into the energy transfer section of the shaft. In the tip section, the hoop stiffness is increased to maintain feel while also stabilizing the tip section for maximum consistency and optimum ball flight.