Upgr8 Universal Aluminum Oil/Fuel / Water/Fluid / Air Line Hose End Fitting (-4AN Swivel, 45 Degree Red and Blue) Universal fit. such as: Oil/ Fuel/ Water/ Fluid/ Air Line with AN-4 Ends Made of High Quality Lightweight T-6061 Aluminum Material Red and Blue Anodized Finish for Durability Removable Head for Twist-Lock Applications Fitting Diameter: AN-4