1.Own mold plant and product injection plant 2.Promise lifetime after sales service 3.ISO9001:2008 certificate Dear Sir or Ms, Thanks for your kind attention!1.You no longer worry about the port number of USB,these 4 port USB hub can easily link the printer,mobile,fax,cameroon and so on.2.Color: varies color available:black,silver, pink3.Machining thickness: 0.15~1.0mm4.Precision tolerance: +/-0. ...