1)."SILKEN" - Pen/pencil carbon papers-royal blue-for handwriting. 2). "COSMO" - Pen/pencil carbon paper-royal blue-for handwriting. 3). "ROYAL STENO" - Typewriter carbon paper-black-for typing. Packing : 100 sheets per box of A/4 & F/S sizes. Also available in reems of 500 sheets of size 18" x 23". 4). One Time Carbon Paper in reems of 500 sheets of size 18" x 23".