sand blasting gun

sand blasting gun has two type, one is Gravity feed pressure and high pressure one, Process method: AL Die-casting, brass casting, iron SS welding, and Polyurethane casting Air inlet outer diameter: 10 & 13mm, Sand inlet outer diameter: 13mm, Inside diameter of sand pipe connection : 21mm,26mm, 31mm, 35mm,48mm,52mm Type A, it is made of AL casting, shinny finishing, male thread, air inlet diameter is 13mm Type B, pipe can be insert directly &lock by screw and thread