supply of gc-20 and gc-21 (loose envelop)gc-20 and gc-21 (loose envelop),(denoting no. gc-21/se-7) loose envelop, printing of envelop, single side in black ink in bil ingual (hindi and english) on paper size 14 x 7 inch (after fold) maplitho brown, a-grade paper 130 gsm (+/ -5%) conforming to is 1848/2018 or latest. as per annexure/sample. [ warranty period: 30 months after t he date of delivery ] ] , (denoting no. gc-20/se-8) loose envelop, printing of envelop, single side in black ink in bil ingual (hindi and english) on paper size 17 x 12 inch (after fold) maplitho brown, a-grade paper 130 gsm ( +/-5%) conforming to is 1848/2018 or latest. as per annexure/sample. [ warranty period: 30 months afte r the date of delivery ] ]