TSK Closed Single Hole Cannulas 50mm x 25G (25) TSK Closed Single Hole Cannulas 50mm x 25G (25) are cannulas developed by TSK with an ultra thin wall. The larger internal diameter allows for less extrusion force and a smoother, more controlled injection. A smoother injection, means less risk of trauma to the patient compared to using a needle. Each pack contains 25 x cannulas
