Tender For supply of writing pens (q4) , binder clips (v3) conforming to is 8231 (q4) , markers and highlighters (q4) , black lead pencils (v3) conforming to is 1375 (q4) , pressure sensitive adhesive tapes with plastic base (v4) conforming to is 13262 (q4) , correspondence envelopes (v3) conforming to is 13892 (q4)