supply of different commercial book for train movement, t-39 register ( opt-442 ) , of size l-580 mm x w-210 mm, one side printing, each book containing 100 sheets with 70 gsm paper with cover as per format enclosed. [ warranty period: 12 months after the date of delivery ] , dtc book ( com-5&6 ) having 100 sheets each, both side printing of size l580 mm x w 440 mm, printing specification with 70gsm with brown cover [ warranty period: 12 months after the date of delivery ] , coaching balance sheet ( com-181 ) both side printing of size l-5855 mmx w-435 mm with 70 gsm paper with brown cover paper as per format enclosed. [ warranty period: 12 months after the date of delivery ]