THE NEW EPB SYSTEM.The low cost solution. VP’s new EPB (economic polymer bearing) System replaces loose ball bearings with specially engineered polymer bearings. This system allows VP to create a more simple, thinner, and lighter pedal for entry level applications. VP pioneered the use of polymer bearings many years ago and now the same proven high-end technology is available as a cost-reducing OEM solution. VP EPB Advantages:Reduced cost due to all in-house production and automatic assembly,Reduced weight,Thinner bodies,Fewer moving parts,Adjustable bearing pre-load,Easily serviced . Material PP resin ,Cage aluminium ,Axle 7mm boron steel,EPB System ,Size 103mm x 64.5mm ,Weight 235g per pair .