Whiteness 103%-105%, 108%-110% Packing 500 sheets per ream, 5 reams per carton(box) Load qty(20ft) Gsm a4 a3 letter size 8.5''x13'' legal size 80gsm 7520 reams 3760 reams 8000 reams 6700 reams 6300 reams 75gsm 7520 reams 3760 reams 8400 reams 7000 reams 6500 reams 70gsm 8460 reams 4230 reams 8800 reams 7300 reams 6700 reams Key performance no jam in photocopy machine no double feed stay flat after copying leave no dust in the copy-machine nice appearance-white and clean nice touch-smooth and bulky no see through-print both sides been developed for: photocopy machines, laser printers, ink-jet printers, fax machines Size A4(210mm*297mm), A3(420mm*297mm) Letter size(8.5''x11'', 216mm*279mm ), 8.5''x13''(216mm*330mm), Legal size(8.5''x14'', 216mm*356mm)