rollers 60 rotate along with the pump shaft 61 they will presses the flexible fluoroelastomer tubing 63 against the surrounding wall inside of the cartridge housing 55 this will displace the volume inside and along the tubing creating suction once suction is created in the system it will allow the peristaltic pump to draw the liquid cosmetic out from the liquid reservoir pouch 32 the liquid cosmetic will travel upward into the liquid cosmetic inlet 65 and along the liquid cosmetic flow channel 64 and exit into the nozzle spraying chamber 78 fig6 shows the spray nozzle assembly made up of a nozzle housing 71 which houses the a spray nozzle 72 a o ring 73 to keep the assembly air tight a nozzle housing cap 74 to encapsulate the assembly together with the cartridge housing 55 and a nozzle cover 75 the spray nozzle 72 can be made out of any suitable materials including but not limited to stainless steel plastic or rubber its entrance opening 76 has an inner diameter of 1 5 mm and its exit opening 77 has an inner diameter of 0 19 mm the exit tip forms a 30 u00b0 angle to the nozzle housing cap 74 and are spaced apart see fig8 a and 8 b the nozzle housing 71 functions to hold the spray nozzle 72 secure and center it within the spraying chamber 78 as shown in cross sectional view of fig7 the airbrush device sprays out liquid cosmetic in two steps first the liquid cosmetic is pumped out from the liquid cosmetic reservoir pouch 32 the liquid cosmetic will travel along the liquid flow channel 64 not shown and into the flexible fluroelastmor tubing 63 the liquid cosmetic will then continue through.