1.Size:A4,A3,8.5x11,B4 2.weight:80G, 75G,70G 3.Brightness:96%-98 ... %, 98-100%;100-102; 102-104% 4.Material:100% Wood pulp 1.Specifications: multi-purpose copy ... place, avoid exposing to the place of high temperature, high humidity and sunlight or light irradiate directly; ... your understanding and cooperation . Hotsell High Quality a4 Office paper a4 copy paper 80gsm 70gsm