Polyurethane/Nylon Plastic Roller BEARINGS TRACK GUIDE WHEEL ALL SIZES UK SELLER
Nylon [PA] Similar to Polyurethane [PU] but Harder Wearing, Silent Running, Lower Friction. SIZES ARE INTERNAL X OUTER DIA X WIDTH mm. Each Hiqh Quality High Precision Bearing is pre lubricated and [zz] Double Shielded.