Anderson Metals Delrin 3/8 In. Plastic Compression Sleeve, 5-Pack is designed to work seamlessly with brass inserts to adapt standard brass compression fittings for use with polyethylene or poly-vinyl tubing. This compression sleeve fits 3/8-inch outside diameter tubing and is crafted from durable acetal plastic, known for its exceptional strength and resistance to wear, moisture, and a variety of chemicals. Its robust construction ensures reliable performance in a range of applications, making it an essential component for secure and efficient tubing connections. Model Number: 30560-06