8 PCS Syringe Needle Combo: 4 x 10ml Syringe + 4 x 80mm Extra Long Blunt Needle for Ink Cartridge Refill CIS CISS 4 x 10 mm Syringe for Refill cartridges and bulk ink CISS CIS Systems Solvent tolerant. Can be used for solvent, pigment and dye ink. Can be use to remove air fom your CIS. See https://www.bchtechnologies.com/blog/cis-prime EXTRA LONG! 80mm Needle can reach bottom of most 100 ml ink bottle and ink supply systems(see picture for comparision) Minimize unnecessary trips and spills