Cover: 250gsm coated duplex board with grey back + four colors printing Cover: 250gsm coated duplex board with grey back + four colors printing Inner paper: 85gsm Cover paper: 450gsm double grey board Page number: 8 colors x 6 sheets=48 sheets/book Usage: hand-maker Packing: 50 books/carton 32gsm carton size: 320 x 230 x 275mm 48gsm carton size: 320 x 230 x 345mm