The present invention may be used for vacuum hair collection for a hair clipper. A conduit may be positioned in the clipper and may have a nozzle positioned adjacent to a cutting blade a forward end of the clipper. The conduit may have a rear opening at a rear end of the clipper. There may be a constriction section formed in the conduit adjacent the nozzle. The conduit may have a nondecreasing cross sectional interior dimension from the constriction section to the rear opening.