4 Piston Lug Mount Forged Billet Dynalite Caliper (Grey) WB120-68064 Piston Lug Mount Forged Billet Dynalite Caliper (Grey)1. 38" 1. 38" Bore Size, 0. 81" Disc Width, 7112 Pad Plate WB120 6806 120 6806 Four corner bleed screws allow the caliper to be mounted in any front, rear, right, or left position, at only 3. 40 pounds Finished in grey anodise for a long lasting durable finish Internal fluid passages no external tubes Utilises a 2. 10 cubic inch type 7112 pad available in numerous Wilwood compounds