The Smiths Medical 537070 is a replacement inner cannula for tracheostomy tubes. It is designed to be used with a size 6mm tracheostomy tube. The cannula is flexible, making it easy to insert and comfortable for the patient. It is made by Portex, a trusted name in medical supplies, ensuring its quality and reliability. This product is disposable and intended for single-use, reducing the risk of infection and cross-contamination. It is also non-sterile, meaning it needs to be sterilized before use. This product comes in a case of 20, making it a cost-effective choice for healthcare facilities.