GALFER DF794W (240x3)Wave W Disc DF794W This is the W type Wave brake disc model, which is manufactured from high carbon stainless steel and cut using laser cutting. It has the original OEM size and is certified by TV (KBA n61147). These are the advantages of the Wave W discs: Reduced weight of unsprung masses. Increased braking power. Better heat dissipation. Excellent corrosion resistance. Less tendency to deform. The contact surface between the disc and pad remains