Ink subtank for inkjet printer like Zhongye, infiniti, challenger, gongzheng, flora, allwin, myjet etc

Ink subtank for inkjet printer like Zhongye,infiniti,challenger,gongzheng,flora,allwin,myjet etc.Please notice the samilarity and the difference bettwen ink subtank and the air subtank,that is: inside of the tank,most of the ink pipes are streched to the bottom and just one not,while the inside of air subtank,no pipes are streched into the bottom