OTC 8104A-SET One Person Vacuum Brake Bleeder with Automatic Master Cylinder Filler OTC's one person brake bleeding system with convenient automatic master cylinder filler allows for fast and efficient vacuum brake bleeding - ideal for both diy'ers and professional technicians Simply connect to shop air then press the quick release trigger for on-demand vacuum and simple hands free operation Clear, extended length hose features a universal rubber fitting that fits securely on brake bleeder screws - stays in place until you want to remove it Compact unit with 17 ounce (500ml) capacity is easy and convenient to store and use; transparent hose and container allow monitoring of brake fluid flow and level 20 oz. capacity Master Cylinder Auto Filler fits all types of master cylinders and automatically refills the brake fluid reservoir during brake bleeding