In 
Out8x16x4 Metal
Product Overview
NOTICE: These are not the standard 8x16x5 that the majority of cars use, this is a special narrow size of 4mm.
The 8x16x4 688ZZ/B4 Halo series of bearings are a high quality steel/chrome bearing with metal shields. These bearings have been tested and proven by many racers. Please check your manual to see if these are bearings you need to use.
