Fistula needle, A.V. fistula needles set are indicated for use in conjunction with a connector of Hemodialysis blood tubing set. AV Fistula Needles used to connect blood lines to the blood vessel through needle when dialysis is carried out via an internal fistula. Flexible butterfly wings are for proper fixation, Color coded wings for easy identification of needle sizes & Soft kink resistant Medical Grade PVC tubing. Ultra thin wall and siliconized Needle for smoother penetration. Special process on blade reduces pain and skin damage for smoother penetration.