Air compressors and parts therefor, namely, air filters, oil filters, valve plates, sheaves, belts, and drain extension kits for air compressors comprising drain shutoff valve, pipe extension, and pipe fitting; air compressor pumps in the nature of compressed air pumps; vacuum pumps; power-operated blowers; apparatus for compressed air treatment and distribution in the nature of parts for compressed-air tools and machines, namely, filters, regulators, lubricators, dryers, separators, valves, pressure gauges, air hoses, couplings and blow guns; paint spray guns; paint spray guns and paint tanks sold as a unit therewith; apparatus and equipment for use in pneumatic systems in the nature of parts for compressed-air tools and machines, namely, oil removal filters, pneumatic condensate auto drains and separators, pneumatic cylinders, pneumatic grippers, pneumatic lubricators, pneumatic regulators, pneumatic slides, pneumatic rotary actuators, air control valves; pneumatic tools in the nature of air powered tools, namely, air guns, air hammers, cut-off tools, die grinders, engraving pens, grinders, nailers and staplers, needle scalers, nibblers, shears, saws, pencil grinders, drills, impact wrenches, polishers and buffers, ratchets, sanders, screwdrivers, tapping tools, riveters; exhaust mufflers for motors; pneumatic mufflers and breathers for pneumatic and compressed-air machines; air brushes for applying paint; replacement parts and fittings for all of the foregoing