Material:  Cover: 300gsm paper and 600gsm gray board as front and back cover
           Inside: 70gsm offset paper for the original duplicated page, and 50gsm offset paper for the copy pages.
Finishing: double-sides black color printing on 1 duplicated page, single-side black color printing on 2 copy pages, 3 sheets for each set, 150 sheets for 50 sets on each,
punching different but ordered code on each set, saddle stitch binding
Size: customized
Quantity: according to your requirements