Premium and Stable: Made of PP nylon 66 engineering plastic with a UL94V-2 flame retardant grade, these strain relief sleeves are designed to last. They have excellent insulation properties, strong toughness, and are resistant to aging, ensuring long-term use. Applicable size:6N-4 for round wire diameter:7.6mm 4N-4 is suitable for flat wire of 3.8mm x 7.6mm. Easy installation: Installing these strain relief sleeves is quick and hassle-free. No special tools are required; simply insert the power cord into the wire buckle, close it, and clamp it with a tool. Then, insert it into the outlet hole of the base plate and secure the power cable. Generous quantity: Each package contains 4 strain relief sleeves of both the 6N-4 and 4N-4 sizes, providing ample supply to meet your daily needs. This ensures that you have enough sleeves for multiple projects or replacements. Wide temperature range: These strain relief sleeves can withstand temperatures up to 75 degrees Celsius, making them suitable for various applications. Whether you’re working indoors or in outdoor environments, these sleeves will maintain their performance and protect your wires effectively., Manufacturer: ECSiNG