Only compatible with NEO OS front hubs which use #6804 bearings (20x32x7mm). Neo OS hubs are less common than standard Neo hubs and were made with larger bearings to allow use of 20mm axles for Downhill and Enduro forks.
These are front RockShox/SRAM-specific Torque-Cap 15mm through axle SealLock end caps for Neo OS and Neo Ultimate OS hubs. SealLock end caps feature a low-friction U-cup seal that snaps into place and stays secure even when your wheel is removed from your bike.
Torque-Cap end caps have the same 15mm inside diameter as other systems, but outside diameter is larger (31mm), making these end caps only compatible with Torque-Cap-compatible forks.
Note: Torque caps are not compatible with Centerlock hubs.