The 4Plastic SHP Plug from Fittings Unlimited Inc is a reliable solution for sealing and capping applications. This plug is made from durable plastic, ensuring resistance to corrosion and wear. With a size of 4mm, it fits securely in various fittings, providing a leak-proof seal. Ideal for use in plumbing and fluid transfer systems, this plug is lightweight and easy to install, making it a practical choice for both professionals and DIY enthusiasts. Its compatibility with standard fittings ensures versatility across different applications.