The Smiths Medical 305506 is an IV Catheter with a retracting needle. It is designed for medical professionals to administer intravenous fluids or medications. The catheter is 18G in size and measures 1¼ inches in length. It features a retracting needle which helps to prevent accidental needle sticks and ensures patient safety. The catheter is colored green for easy identification. Each box contains 50 catheters, and each case contains 4 boxes. This product is designed for single use and should be disposed of after use.