General description Vacuum and pressure pumps create and maintain a metered vacuum for testing a wide variety of automotive, marine, aviation, and agricultural equipment. This 21-piece Handheld Vacuum Pump Set is ideal for various vacuum testing applications, including brake bleeding, fuel systems, and engine management systems. Technical specifications Pressure: up to 3.1 bar (45 PSI) Vacuum: up to 20 inHG Dual function vacuum: 0-30 in vacuum (0 to -1 bar) Measurement allowed error: +/- 1-3 cm Compatibility and accessories 1 * Vacuum Pump / Brake Bleeder 2 * Cup 2 * Long Transparent Hose 2 * Short Transparent Hose 1 * Sealing Cover 13 * Black Adapter with Red Bag 1 * Instruction Manual in Chinese and English Usage This vacuum pump set is perfect for a wide range of applications on many vehicles, including: Vacuum reservoirs Automatic transmission Air conditioning and heating Heater cones Braking systems (including ABS and conventional systems) Engine tuning and management Piston