They are a direct replacement for the stock guides on all of your Tekno RC vehicles

and O-rings are rubber

giving you a stronger

Traxxas 4894 Nitro 4-Tec Front Pulley Shaft

Convenient drop-in replacement

NSR Formula 22/26 Monaco GP Senna Tribute Livery #81 1/32 Slot Car F1 NSR0540 Wraith Parts They are a direct replacementNSR Formula 22 26 Monaco GP Senna Tribute Livery #81 1 32 Scale Analog Slot Car. Features: High tech NSR components 21. 400 rpm @ 12 Volts Motor Inline motor mount configuration Aluminum Wheels Soft compound tires, give an exceptional grip on any kind of track surface This Slot Car will work on all Analog (non digital) 1 32 scale tracks like Ninco, SCX, Scalextric, Carrera, and others