Stan's NoTubes - Kit, E-Sync, Freehub Seals (Black) synkro-clone-ktm-shop-nederland It has a very good

It has a very good quality/price ratio

Also compatible with Neo Micro Spline Durasync freehubs

Syncros OE Press Fit / 1 1/8"

Looseball - Hub rear: Sunday

Stan's NoTubes - Kit, E-Sync, Freehub Seals (Black) synkro-clone-ktm-shop-nederland It has a very goodThis seal is positioned between the freehub and hub shell on all E sync hubs. It is designed for a precise fit that prevents dirt and other contaminants from entereing the hub so the hub internals keep working smoothly. This seal is compatible with all E sync hubs. Not compatible with M pulse, Neo, or Neo Ultimate freehubs, but can be used in conjunction with E sync freehub as a retrofit upgrade to Neo and Neo Ultimate hubs.