We would like to know more about your product more the quality and compare to any brands like ntn nsk nachi & koyo, can I compare your hubs to any of them, and how close, or can we send them for a comparison test, and are you the manufacturer, or just a distributor quote me please on the followinghub 184hub 184-428BWK12DACF 1015DAC 346437447318Bthanks!!