... C5/C6 etc. Competitive SpecificationNo. 10, - 4-1/8in x 9 1/2 in , v-flap, plain, 50 counts per ... in , v-flap, security, 40counts per box No. 10, - 4-1/8in x 9 1/2 in , peel & seal, plain, ... 55counts per boxNo. 10, - 4-1/8in x 9 1/2 in , peel & seal , security, 45counts per boxNo ... 40’HQ: 3200 boxes for No. 6, and 2624 boxes for No. 10 Envelope No. 6 No. 10 plain security gummed ...