The Fibreball system is designed for large mainsails with self-captive bearings.
All sliders and cars are suitable for the FB24 track system.
FB24.60 system is suitable for 50ft boats with an HS24 track and 60mm sliders.
FB24.90 system suitable for 60ft boats with an HS24 track and 90mm sliders.
FB24.120 system suitable for 70ft boats with an HS24 track and 120mm sliders.