Z3 Series 2 HTE Spray Gun complete with 600ml Pot The AZ3HTE is an affordable high transfer efficiency centre post gravity feed spray gun. The perfect gun for primer and heavy bodied materials, the AZ3HTE is a must have in every bodyshop. One of the many upgrades the re-modelled AZ3HTE features is a separation of the air control and your air hose, along with a newly designed air cap and a polished body for easier cleaning and maintenance.