These are specialized cannula that are needed during various ophthalmic surgeries. Individually Packed. Supplied Sterile. Manufactured from Medical Grade SS-304. Hub made from Medical grade Polypropylene.Each cannula goes through a detailed Quality Check to ensure that the cannula needle is smooth and the tips are ultra smooth. The needle is cheked for any blockages to ensure that it will allow a free flow of liquid during its operation. This ensures peace of mind for the surgeon during surgery.