10x19x5 Halo bearing by Avid Racing Concepts is typically used in popular helicopters. Check your manual for the correct size for your vehicle if you are not certain.
Bearing Dimensions
METRIC: 10mm (Inner) x 19mm (Outer) x 5mm (Width)
STANDARD: 0.3937" (Inner) x 0.74803" (Outer) x 0.19685" (Width)