FSI (FREE-SPINNING INSERT) FOR RES

FSI (Free-Spinning Spool Insert): Designed as an upgrade for the SubGravity RES (Ridiculously Enhanced Spool)
Seamless Fit: Integrates effortlessly into your RES
Enhanced Functionality: Provides a free-spinning center for easier line handling, shooting SMBs, and more
 
SubGravity FSI (Free-Spinning Insert): Available in three sizes to match your favorite RES
Size Options:
22mm
32mm
42mm
Perfect Fit: Simply order the same size as your RES for optimal compatibility