The Vevor 4.5 CFM vacuum pump is a single-stage rotary vane pump designed for HVAC service, automotive A/C work, vacuum packaging, and refrigeration maintenance. It features a 1/3 HP motor, 5 Pa ultimate vacuum rating, and a durable aluminum alloy housing for stable operation. An oil viewing window helps monitor oil levels, while the backflow prevention design helps reduce contamination. The ergonomic handle improves portability for jobsite and workshop use. This compact pump is built for commercial and household applications.