... 440mm 1.Quality Warranty:100% guarantee.all we are seeking is constant relationship with our client. We take your order seriously.R&D:With ... 1st:Prior to being released to produce,all the components are inspected strictly; 2nd:During production,every step will have print ... test . 3rd:After finished producion,each products are inspected by series procedures(print test,page yield test,lift ...