OPT Brand. 4 x 10ml Syringe with blunt 4" Long Needle to Refill Ink Cartridge Cartridges CISS CIS OPT Brand. Free shipping from New York. This sale is 4 syringes and 4 needles. Syringe is 10ml. You can use this syringe and needle set to refill ink cartridges or CISS. These are not for any medical purpose use. 100% satisfaction guarantee or money back.