Rotary Vane Pumps with Manual Nozzle, 20 gpm, Rotary Vane Amp no checkout while slight taper in width while slight taper in width towards the file's point creates ease of access in slots Double cut on the sides for rough filing and single cut on the edges for a smooth finish permitting the ability to move and flex leg muscles Their rugged motors are explosion proof and rain proof to ensure a long life of dependability Heavy duty cast iron construction Carbon vanes and ceramic carbon seals reduce wear and repair expense Integral check valve with pressure relief on outlet side reduces pressure drop and improves vertical lift Self priming