This is a custom shaft that was used with the RS X Max. As shown in the photos, it comes with a PRGR sleeve. *Compatible with PRGR RS X (2024) series and later. Speeder NX Blue 60-S Flex High-performance shaft with Variable Torque Core. Fujikura - Model Name: Speeder NX Speeder NX - Torque Core: Variable Torque Core VTC (VARIABLE TORQUE CORE) - Flex: 60-S - Brand: Fujikura - Connection: PRGR Sleeve