Features In double Lumen curved Hemodialysis catheter the distal and Proximal ends are curved. Pinching Clamp is used to stop the back flow. Its soft tapered tip gives lesser trauma to the patient. 8.5F ID 14Gx14G Length-11cm,13 cm,15 cm & 16cm. 11.5F ID 12Gx12G Length-13cm,15cm, 16cm & 20cm. 12F ID 12Gx12G Length-13cm, 15cm, 16cm & 20cm.