- Description: Protect your electrical connections with the TE Connectivity / Raychem Brand 202D121-4/42-0 Heat Shrink Flexible Molded Boot. This boot is made of durable ST Polyolefin material and provides excellent protection against environmental factors such as moisture, dust, and chemicals. It is designed to shrink securely around the connection, creating a tight seal that helps prevent damage and ensures reliable performance. Perfect for a wide range of applications, this boot is a versatile and essential component for any electrical project.