3x8x4 Metal

The Halo series of bearings are a high quality steel/chrome bearing with metal shields. These bearings have been tested and proven by many racers.

The 3x8x4 Metal 633ZZ bearing is commonly used in the T-Rex 450 X, XL, SE Helicopters and in the Thunder Tiger Raptor 30 helicopter (seesaw bearings and uses 6 of them). Check your manual for the correct size for you vehicle if you are not certain.

• METRIC: 3mm (Inner) x 8mm (Outer) x 4mm (Width)
• STANDARD: 0.11811" (Inner) x 0.31496" (Outer) x 0.15748" (Width)