Features: 1) Simple instruction and easy operating. 2) Air filling with foot switch to avoid busting rubber. 3) Air discharging with foot switch while end of scraping. 4) The support piston is up and down by the control of foot swith. 5) This system is automatic and can be used for PP spraying or brushing.
6) Two legs have different air filling system,ther is a possibility to fill air to different pressure.
