Cat fuel injector nozzles utilize specialized product metallurgy, proprietary manufacturing processes and design, to deliver injectors capable of meeting today's performance and injection pressures for emissions requirements. Mount Type: Mushroom Mount Overall Length (mm): 31.8 Overall Length (in): 1.25 Sleeve Length (mm): 25.4 Sleeve Length (in): 1 Head Outside Diameter (mm): 44.4 Head Outside Diameter (in): 0.069 Pilot Outside Diameter (mm): 31.5 Pilot Outside Diameter (in): 1.24 Inside Diameter (mm): 13.1 Inside Diameter (in): 0.51 Standard Bolt Size: M12