supply of spring /cobra filespring /cobra file,spring / cobra file of material: paper board, length: 350 mm, width: 250 mm, gsm: 515 -535, location of metal clip: on the left side of inside of the cover with hard metallic wire to engage wit h the spring for flipping papers smoothly, size of clip: 135mm x 17 mm, no. of eyelet: 2 nos. in the ce nter of the left side of the file cover at a gap of 80 mm with proper fitting. n.b.: front cover with india n railway logo as per attached annexure. firm has to get prior approval of sample before bulk supply. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]