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 connection, B type has large sand blasting flow rate compare to thread connect, because the thread type is controlled by fitting, insert into gun directly which can spray the sand itself has same size of pipe inlet,

18,20,21,22.5mm nozzle are suit for A ,B,C type gun