Spacers 6mm for all models with 6mm shafts. The spacers are between the two wheel bearings.
The spacers allow the bearings to not block when tightening the axles around the wheel.
Since 1997, Nomadeshop offers you a very wide range of urban sliding products. Quality and low prices are the key words. Nomadeshop also develops its own products, under the brand Nomades, which you can find here.